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дигитализацију","\u002Fportfolio\u002Fdigitalisierungsportal-archiv-museum-bibliothek-ead-lido-mets-mods",[],{"statusCode":4,"data":206,"message":860},{"id":207,"title":208,"slug":209,"content":210,"contentJson":211,"excerpt":472,"featuredImage":473,"featuredImageAlt":474,"featuredImageCaption":10,"featuredImageTitle":10,"featuredImageCopyright":10,"featuredImageAuthor":10,"featuredImageSourceUrl":10,"featuredImageLicense":10,"featuredImageIsAiGenerated":43,"status":475,"publishedAt":476,"createdAt":477,"updatedAt":478,"seoLocalePaths":479,"categories":488,"author":502,"translations":507},"453","Recenzija firmvera ZBT Z8102AX OpenWrt 21.02: Dovoljno stabilan, ali da li je spreman za budućnost?","zbt-z8102ax-openwrt-2102-firmware-review","\u003Ch1>Recenzija ZBT Z8102AX OpenWrt 21.02 firmvera: Dovoljno stabilan, ali da li je spreman za budućnost?\u003C\u002Fh1>\n\u003Cp>ZBT Z8102AX koji je ovde testiran pokreće modifikovani OpenWrt 21.02 firmver proizvođača sa kernelom 5.4.246. To je važan detalj. Ovo nije čista zvanična OpenWrt instalacija, već verzija specifična za proizvođača prilagođena ovom ruteru, Quectel RM500U-EA modemu i dual-SIM hardveru.\u003C\u002Fp>\n\u003Cp>U prvom periodu testiranja, firmver je uspešno radio i ostao dovoljno stabilan za praktičnu upotrebu. Ruter je postigao nekoliko dana neprekidnog rada (uptime), modem se povezao na mrežu, SIM kartica je prepoznata i mobilna veza je radila. To je dobra polazna tačka. Ali firmver se ne svodi samo na to da li se ruter pokreće i povezuje. Radi se i o dugoročnim ažuriranjima, bezbednosti, kontroli modema, oporavku i spremnosti za budućnost.\u003C\u002Fp>\n\u003Ch2>Deo serije testova za ZBT Z8102AX\u003C\u002Fh2>\n\u003Cp>Ovaj članak se fokusira na stranu firmvera rutera ZBT Z8102AX. Glavna recenzija je dostupna na \u002Fblog\u002Fzbt-z8102ax-5g-openwrt-router-review. Recenzija hardvera i pakovanja je dostupna na \u002Fblog\u002Fzbt-z8102ax-hardware-packaging-review. Sledeći članci će pokriti RM500U-EA modem, dual-SIM failover (rezervnu vezu), odluke o kupovini i sledeći korak ka moćnijem Wi-Fi 7 OpenWrt ruteru.\u003C\u002Fp>\n\u003Ch2>Trenutno stanje firmvera\u003C\u002Fh2>\n\u003Cp>Testirani ruter se identifikuje kao ZBT-Z8102AX-2SIM. Verzija firmvera prikazana u interfejsu je OpenWrt 21.02 25.1118_204421, koja radi na kernelu 5.4.246. Modem je detektovan kao Quectel RM500U-EA. Tokom testa, ruter je radio na mreži o2 Germany sa uočenom LTE Band 3 i NR n28 vezom.\u003C\u002Fp>\n\u003Cul>\u003Cli>Model uređaja koji prikazuje firmver: ZBT-Z8102AX-2SIM\u003C\u002Fli>\u003Cli>Baza firmvera: OpenWrt 21.02\u003C\u002Fli>\u003Cli>Verzija firmvera (build): 25.1118_204421\u003C\u002Fli>\u003Cli>Verzija kernela: 5.4.246\u003C\u002Fli>\u003Cli>Modem: Quectel RM500U-EA\u003C\u002Fli>\u003Cli>Status SIM kartice tokom testiranja: spremna\u003C\u002Fli>\u003Cli>Uočena mreža: o2 Germany\u003C\u002Fli>\u003Cli>Uočena veza: LTE Band 3 sa NR n28\u003C\u002Fli>\u003C\u002Ful>\n\u003Ch2>Šta dobro funkcioniše\u003C\u002Fh2>\n\u003Cp>Najvažnija pozitivna tačka je jednostavna: firmver radi. Ruter se pokreće, modem je detektovan, SIM kartica je prepoznata, APN se može koristiti i mobilna veza se uspostavlja. Tokom prvog testnog perioda, ruter je ostao dovoljno stabilan za svakodnevno testiranje i nije pokazao kritične greške.\u003C\u002Fp>\n\u003Cp>Za testni uređaj, to nije mala stvar. Mnogi OEM ruteri izgledaju zanimljivo na papiru, ali ne uspevaju u osnovnoj stabilnosti modema, lošem rukovanju SIM karticom ili nestabilnom firmveru proizvođača. U ovom slučaju, ZBT Z8102AX je prošao prvu praktičnu proveru stabilnosti.\u003C\u002Fp>\n\u003Cul>\u003Cli>Ruter se pokreće i ostaje na mreži\u003C\u002Fli>\u003Cli>RM500U-EA modem je detektovan\u003C\u002Fli>\u003Cli>SIM kartica je prepoznata\u003C\u002Fli>\u003Cli>Mobilna veza radi\u003C\u002Fli>\u003Cli>Veb interfejs zasnovan na OpenWrt-u je dostupan\u003C\u002Fli>\u003Cli>Zabeleženo je nekoliko dana stabilnog rada (uptime)\u003C\u002Fli>\u003Cli>Dovoljno dobro za nastavak testiranja\u003C\u002Fli>\u003C\u002Ful>\n\u003Ch2>Gde se osećaju ograničenja firmvera\u003C\u002Fh2>\n\u003Cp>Slaba tačka nije osnovna funkcionalnost. Slaba tačka je kontrola. Interfejs pruža dovoljno informacija da se razume da je ruter povezan, ali ne i dovoljno duboku vidljivost modema za ozbiljno testiranje. 5G ruter bi idealno trebalo da prikazuje detaljne vrednosti signala kao što su RSRP, RSRQ, SINR, informacije o ćeliji, kombinacije opsega i stanje modema na jasan način.\u003C\u002Fp>\n\u003Cp>Isto važi i za automatizaciju. Ruter sa dve SIM kartice postaje mnogo vredniji kada može automatski da pređe sa SIM1 na SIM2 na osnovu povezivanja, kvaliteta signala, kvara operatera ili prilagođenih pravila. Ovo je upravo mesto gde se jednostavan interfejs proizvođača često čini previše ograničenim.\u003C\u002Fp>\n\u003Cul>\u003Cli>Ograničena dijagnostika modema\u003C\u002Fli>\u003Cli>Nejasna dubina automatizacije sa dve SIM kartice\u003C\u002Fli>\u003Cli>Još uvek nema potvrđenog naprednog toka rada za SIM failover\u003C\u002Fli>\u003Cli>Nejasno ponašanje zaključavanja frekvencijskih opsega\u003C\u002Fli>\u003Cli>Stara OpenWrt baza\u003C\u002Fli>\u003Cli>Stara baza kernela\u003C\u002Fli>\u003Cli>Nejasna politika dugoročnih ažuriranja\u003C\u002Fli>\u003C\u002Ful>\n\u003Ch2>Da li je OpenWrt 21.02 i dalje prihvatljiv?\u003C\u002Fh2>\n\u003Cfigure>\u003Cimg src=\"\u002Fsr\u002F_ipx\u002Ff_webp&q_85\u002Fuploads\u002F2026\u002F06\u002Fopenwrt-router-review-dual-sim-05-1781620596218-5ldld4.webp\" alt=\"AI generisana slika\" class=\"rounded-lg\" \u002F>\u003Cfigcaption class=\"mt-2 space-y-0.5\">\u003Cdiv class=\"editorjs-image__title text-sm font-medium text-gray-700 dark:text-gray-200\">AI generisana slika\u003C\u002Fdiv>\u003Cdiv class=\"editorjs-image__copyright text-[11px] uppercase tracking-wide text-gray-500 dark:text-gray-400\">© AI\u003C\u002Fdiv>\u003Cdiv class=\"editorjs-image__license text-[11px] text-gray-500 dark:text-gray-400\">License: AI-generisano \u002F interna upotreba\u003C\u002Fdiv>\u003C\u002Ffigcaption>\u003C\u002Ffigure>\n\u003Cp>Za privatni test uređaj, OpenWrt 21.02 može biti prihvatljiv ako je ruter stabilan, modem radi i uređaj nije neoprezno izložen. U ovom prvom testu, firmver je obavio svoj osnovni posao. Povezao se, ostao na mreži i omogućio da se ruter koristi kao 5G mrežni uređaj.\u003C\u002Fp>\n\u003Cp>Za profesionalni proizvod, međutim, OpenWrt 21.02 nije idealan kao dugoročna osnova. Problem nije samo broj verzije. Problem je kombinacija stare osnove, izmena specifičnih za proizvođača, nejasnog puta nadogradnje i hardverskih zavisnosti specifičnih za modem. Noviji firmver je privlačan, ali samo ako u potpunosti podržava tačnu reviziju hardvera, kontrolu napajanja modema, upravljanje dual-SIM GPIO-om i proces oporavka.\u003C\u002Fp>\n\u003Ch2>Pitanje nadogradnje\u003C\u002Fh2>\n\u003Cp>Proizvođač navodi da je nadogradnja na noviji firmver moguća. To je lepo čuti, ali samo po sebi nije dovoljno. Pre bilo kakve nadogradnje firmvera, moraju se verifikovati tačna revizija hardvera, raspored particija, metod oporavka i originalna fabrička slika. Standardna LuCI rezervna kopija konfiguracije nije potpuna rezervna kopija sistema i ne može zameniti originalnu sliku firmvera.\u003C\u002Fp>\n\u003Cp>Važno pitanje nije samo da li postoji novija slika. Važno pitanje je da li novija slika podržava tačno ovu dual-SIM Z8102AX varijantu bez narušavanja napajanja modema, prebacivanja SIM kartica, rada na 5G mreži ili oporavka.\u003C\u002Fp>\n\u003Cul>\u003Cli>Potvrdite tačnu reviziju hardvera\u003C\u002Fli>\u003Cli>Sačuvajte originalni firmver proizvođača\u003C\u002Fli>\u003Cli>Izvezite trenutnu konfiguraciju\u003C\u002Fli>\u003Cli>Dokumentujte raspored particija\u003C\u002Fli>\u003Cli>Proverite režim oporavka\u003C\u002Fli>\u003Cli>Proverite podršku za modem pre flešovanja\u003C\u002Fli>\u003Cli>Nemojte slepo vraćati stara podešavanja na novi firmver\u003C\u002Fli>\u003C\u002Ful>\n\u003Ch2>Zašto bi slepo flešovanje bilo greška\u003C\u002Fh2>\n\u003Cp>Ruter nije običan stoni računar. On zavisi od specifične logike firmvera za ploču, inicijalizacije modema, kontrole napajanja, prebacivanja SIM kartica i podrške za stablo uređaja (device tree). Ako je jedan od ovih delova pogrešan, ruter se može pokrenuti, ali modem može prestati da radi ispravno. To bi bilo gore nego zadržavanje starije, ali funkcionalne verzije proizvođača.\u003C\u002Fp>\n\u003Cp>Noviji firmver je poboljšanje samo ako poboljšava ceo uređaj. Novije jezgro (kernel), noviji paketi i čistiji interfejs su korisni, ali ne po cenu gubitka 5G mreže, rada sa dve SIM kartice ili stabilnog oporavka.\u003C\u002Fp>\n\u003Ch2>Šta bi idealan firmver trebalo da pruži\u003C\u002Fh2>\n\u003Cp>Za ovaj tip rutera, idealan firmver bi kombinovao otvorenost OpenWrt-a sa snažnim upravljanjem modemom. To znači bolju dijagnostiku, kontrolisano ponašanje pri ponovnom povezivanju, SIM failover, zaključavanje opsega, watchdog logiku i bezbedan proces nadogradnje i vraćanja na prethodnu verziju.\u003C\u002Fp>\n\u003Cul>\u003Cli>Detaljna dijagnostika modema\u003C\u002Fli>\u003Cli>Prikaz RSRP, RSRQ i SINR parametara\u003C\u002Fli>\u003Cli>Zaključavanje opsega i kontrola mrežnog režima\u003C\u002Fli>\u003Cli>Ručno i automatsko prebacivanje SIM kartica\u003C\u002Fli>\u003Cli>Automatsko ponovno povezivanje i watchdog modema\u003C\u002Fli>\u003Cli>Jasan proces oporavka\u003C\u002Fli>\u003Cli>Dokumentovana putanja nadogradnje\u003C\u002Fli>\u003Cli>Stabilna podrška za OpenWrt pakete\u003C\u002Fli>\u003C\u002Ful>\n\u003Ch2>Firmver kao poslovni rizik\u003C\u002Fh2>\n\u003Cp>Za privatno testiranje, funkcionalan fabrički firmver je dovoljan za nastavak rada. Za dalju prodaju, brendiranje ili profesionalnu primenu, firmver postaje poslovni rizik. Dobra hardverska platforma može brzo izgubiti vrednost ako je firmver zastareo, nedokumentovan ili ga je teško oporaviti. Na ovom tržištu, jeftin hardver može postati skup ako su podrška i oporavak slabi.\u003C\u002Fp>\n\u003Cp>Zato je putanja firmvera jednako važna kao i modem i kućište. Ozbiljna strategija proizvoda zahtevala bi stabilan osnovni firmver, testiranu metodu oporavka, jasno upravljanje izdanjima i realnu politiku podrške.\u003C\u002Fp>\n\u003Ch2>Sledeći testovi firmvera\u003C\u002Fh2>\n\u003Cp>Sledeći korak je prikupljanje više sistemskih informacija sa rutera i pažljivo poređenje mogućih opcija firmvera. Cilj nije brzo flešovanje, već razumevanje da li noviji sistem zasnovan na OpenWrt-u može poboljšati ruter bez stvaranja novih problema.\u003C\u002Fp>\n\u003Cul>\u003Cli>Prikupljanje informacija o ploči\u003C\u002Fli>\u003Cli>Provera rasporeda particija\u003C\u002Fli>\u003Cli>Verifikacija originalne slike firmvera\u003C\u002Fli>\u003Cli>Testiranje pristupa oporavku\u003C\u002Fli>\u003Cli>Evaluacija zvanične OpenWrt podrške\u003C\u002Fli>\u003Cli>Evaluacija ROOter-a ili drugih OpenWrt varijanti fokusiranih na modeme\u003C\u002Fli>\u003Cli>Dokumentovanje ponašanja SIM kartice i modema pre bilo kakve promene firmvera\u003C\u002Fli>\u003C\u002Ful>\n\u003Ch2>Zaključak\u003C\u002Fh2>\n\u003Cp>Fabrički OpenWrt 21.02 firmver na ZBT Z8102AX je bolji nego što se očekivalo u jednom važnom pogledu: radi i ostao je stabilan tokom prvog testnog perioda. To čini ruter korisnim i daje hardveru fer šansu.\u003C\u002Fp>\n\u003Cp>U isto vreme, OpenWrt 21.02 nije komforno dugoročno rešenje. Ruteru je potrebno dublje testiranje firmvera, bolja vidljivost modema i proverena putanja nadogradnje pre nego što se može oceniti kao ozbiljna dugoročna platforma. Za sada, najbolja odluka je jasna: ne flešujte naslepo, prvo dokumentujte sve i tretirajte firmver kao najvažniju sledeću oblast testiranja.\u003C\u002Fp>",{"time":212,"blocks":213,"version":471},1781623400445,[214,219,225,230,236,241,246,251,267,272,277,282,295,300,305,310,323,328,341,346,351,356,361,366,379,384,389,394,399,404,418,423,428,433,438,443,456,461,466],{"id":215,"data":216,"type":42,"tunes":218},"zbt-fw-title",{"text":217,"level":40},"Recenzija ZBT Z8102AX OpenWrt 21.02 firmvera: Dovoljno stabilan, ali da li je spreman za budućnost?",{},{"id":220,"data":221,"type":223,"tunes":224},"zbt-fw-intro-1",{"text":222},"ZBT Z8102AX koji je ovde testiran pokreće modifikovani OpenWrt 21.02 firmver proizvođača sa kernelom 5.4.246. To je važan detalj. Ovo nije čista zvanična OpenWrt instalacija, već verzija specifična za proizvođača prilagođena ovom ruteru, Quectel RM500U-EA modemu i dual-SIM hardveru.","paragraph",{},{"id":226,"data":227,"type":223,"tunes":229},"zbt-fw-intro-2",{"text":228},"U prvom periodu testiranja, firmver je uspešno radio i ostao dovoljno stabilan za praktičnu upotrebu. Ruter je postigao nekoliko dana neprekidnog rada (uptime), modem se povezao na mrežu, SIM kartica je prepoznata i mobilna veza je radila. To je dobra polazna tačka. Ali firmver se ne svodi samo na to da li se ruter pokreće i povezuje. Radi se i o dugoročnim ažuriranjima, bezbednosti, kontroli modema, oporavku i spremnosti za budućnost.",{},{"id":231,"data":232,"type":42,"tunes":235},"zbt-fw-series-heading",{"text":233,"level":234},"Deo serije testova za ZBT Z8102AX",2,{},{"id":237,"data":238,"type":223,"tunes":240},"zbt-fw-series-text",{"text":239},"Ovaj članak se fokusira na stranu firmvera rutera ZBT Z8102AX. Glavna recenzija je dostupna na \u002Fblog\u002Fzbt-z8102ax-5g-openwrt-router-review. Recenzija hardvera i pakovanja je dostupna na \u002Fblog\u002Fzbt-z8102ax-hardware-packaging-review. Sledeći članci će pokriti RM500U-EA modem, dual-SIM failover (rezervnu vezu), odluke o kupovini i sledeći korak ka moćnijem Wi-Fi 7 OpenWrt ruteru.",{},{"id":242,"data":243,"type":42,"tunes":245},"zbt-fw-current-heading",{"text":244,"level":234},"Trenutno stanje firmvera",{},{"id":247,"data":248,"type":223,"tunes":250},"zbt-fw-current-text-1",{"text":249},"Testirani ruter se identifikuje kao ZBT-Z8102AX-2SIM. Verzija firmvera prikazana u interfejsu je OpenWrt 21.02 25.1118_204421, koja radi na kernelu 5.4.246. Modem je detektovan kao Quectel RM500U-EA. Tokom testa, ruter je radio na mreži o2 Germany sa uočenom LTE Band 3 i NR n28 vezom.",{},{"id":252,"data":253,"type":265,"tunes":266},"zbt-fw-current-list",{"meta":254,"items":255,"style":264},{},[256,257,258,259,260,261,262,263],"Model uređaja koji prikazuje firmver: ZBT-Z8102AX-2SIM","Baza firmvera: OpenWrt 21.02","Verzija firmvera (build): 25.1118_204421","Verzija kernela: 5.4.246","Modem: Quectel RM500U-EA","Status SIM kartice tokom testiranja: spremna","Uočena mreža: o2 Germany","Uočena veza: LTE Band 3 sa NR n28","unordered","list",{},{"id":268,"data":269,"type":42,"tunes":271},"zbt-fw-good-heading",{"text":270,"level":234},"Šta dobro funkcioniše",{},{"id":273,"data":274,"type":223,"tunes":276},"zbt-fw-good-text-1",{"text":275},"Najvažnija pozitivna tačka je jednostavna: firmver radi. Ruter se pokreće, modem je detektovan, SIM kartica je prepoznata, APN se može koristiti i mobilna veza se uspostavlja. Tokom prvog testnog perioda, ruter je ostao dovoljno stabilan za svakodnevno testiranje i nije pokazao kritične greške.",{},{"id":278,"data":279,"type":223,"tunes":281},"zbt-fw-good-text-2",{"text":280},"Za testni uređaj, to nije mala stvar. Mnogi OEM ruteri izgledaju zanimljivo na papiru, ali ne uspevaju u osnovnoj stabilnosti modema, lošem rukovanju SIM karticom ili nestabilnom firmveru proizvođača. U ovom slučaju, ZBT Z8102AX je prošao prvu praktičnu proveru stabilnosti.",{},{"id":283,"data":284,"type":265,"tunes":294},"zbt-fw-good-list",{"meta":285,"items":286,"style":264},{},[287,288,289,290,291,292,293],"Ruter se pokreće i ostaje na mreži","RM500U-EA modem je detektovan","SIM kartica je prepoznata","Mobilna veza radi","Veb interfejs zasnovan na OpenWrt-u je dostupan","Zabeleženo je nekoliko dana stabilnog rada (uptime)","Dovoljno dobro za nastavak testiranja",{},{"id":296,"data":297,"type":42,"tunes":299},"zbt-fw-limits-heading",{"text":298,"level":234},"Gde se osećaju ograničenja firmvera",{},{"id":301,"data":302,"type":223,"tunes":304},"zbt-fw-limits-text-1",{"text":303},"Slaba tačka nije osnovna funkcionalnost. Slaba tačka je kontrola. Interfejs pruža dovoljno informacija da se razume da je ruter povezan, ali ne i dovoljno duboku vidljivost modema za ozbiljno testiranje. 5G ruter bi idealno trebalo da prikazuje detaljne vrednosti signala kao što su RSRP, RSRQ, SINR, informacije o ćeliji, kombinacije opsega i stanje modema na jasan način.",{},{"id":306,"data":307,"type":223,"tunes":309},"zbt-fw-limits-text-2",{"text":308},"Isto važi i za automatizaciju. Ruter sa dve SIM kartice postaje mnogo vredniji kada može automatski da pređe sa SIM1 na SIM2 na osnovu povezivanja, kvaliteta signala, kvara operatera ili prilagođenih pravila. Ovo je upravo mesto gde se jednostavan interfejs proizvođača često čini previše ograničenim.",{},{"id":311,"data":312,"type":265,"tunes":322},"zbt-fw-limits-list",{"meta":313,"items":314,"style":264},{},[315,316,317,318,319,320,321],"Ograničena dijagnostika modema","Nejasna dubina automatizacije sa dve SIM kartice","Još uvek nema potvrđenog naprednog toka rada za SIM failover","Nejasno ponašanje zaključavanja frekvencijskih opsega","Stara OpenWrt baza","Stara baza kernela","Nejasna politika dugoročnih ažuriranja",{},{"id":324,"data":325,"type":42,"tunes":327},"zbt-fw-openwrt21-heading",{"text":326,"level":234},"Da li je OpenWrt 21.02 i dalje prihvatljiv?",{},{"id":329,"data":330,"type":339,"tunes":340},"pcu3c1Shpz",{"file":331,"meta":333,"caption":338,"stretched":43,"withBorder":43,"withBackground":43},{"url":332},"\u002Fsr\u002F_ipx\u002Ff_webp&q_85\u002Fuploads\u002F2026\u002F06\u002Fopenwrt-router-review-dual-sim-05-1781620596218-5ldld4.webp",{"title":334,"author":335,"license":336,"copyright":337,"sourceUrl":10,"isAiGenerated":14},"AI generisana slika","AI","AI-generisano \u002F interna upotreba","© Stajic Platform (AI generisano)","","image",{},{"id":342,"data":343,"type":223,"tunes":345},"zbt-fw-openwrt21-text-1",{"text":344},"Za privatni test uređaj, OpenWrt 21.02 može biti prihvatljiv ako je ruter stabilan, modem radi i uređaj nije neoprezno izložen. U ovom prvom testu, firmver je obavio svoj osnovni posao. Povezao se, ostao na mreži i omogućio da se ruter koristi kao 5G mrežni uređaj.",{},{"id":347,"data":348,"type":223,"tunes":350},"zbt-fw-openwrt21-text-2",{"text":349},"Za profesionalni proizvod, međutim, OpenWrt 21.02 nije idealan kao dugoročna osnova. Problem nije samo broj verzije. Problem je kombinacija stare osnove, izmena specifičnih za proizvođača, nejasnog puta nadogradnje i hardverskih zavisnosti specifičnih za modem. Noviji firmver je privlačan, ali samo ako u potpunosti podržava tačnu reviziju hardvera, kontrolu napajanja modema, upravljanje dual-SIM GPIO-om i proces oporavka.",{},{"id":352,"data":353,"type":42,"tunes":355},"zbt-fw-upgrade-heading",{"text":354,"level":234},"Pitanje nadogradnje",{},{"id":357,"data":358,"type":223,"tunes":360},"zbt-fw-upgrade-text-1",{"text":359},"Proizvođač navodi da je nadogradnja na noviji firmver moguća. To je lepo čuti, ali samo po sebi nije dovoljno. Pre bilo kakve nadogradnje firmvera, moraju se verifikovati tačna revizija hardvera, raspored particija, metod oporavka i originalna fabrička slika. Standardna LuCI rezervna kopija konfiguracije nije potpuna rezervna kopija sistema i ne može zameniti originalnu sliku firmvera.",{},{"id":362,"data":363,"type":223,"tunes":365},"zbt-fw-upgrade-text-2",{"text":364},"Važno pitanje nije samo da li postoji novija slika. Važno pitanje je da li novija slika podržava tačno ovu dual-SIM Z8102AX varijantu bez narušavanja napajanja modema, prebacivanja SIM kartica, rada na 5G mreži ili oporavka.",{},{"id":367,"data":368,"type":265,"tunes":378},"zbt-fw-upgrade-list",{"meta":369,"items":370,"style":264},{},[371,372,373,374,375,376,377],"Potvrdite tačnu reviziju hardvera","Sačuvajte originalni firmver proizvođača","Izvezite trenutnu konfiguraciju","Dokumentujte raspored particija","Proverite režim oporavka","Proverite podršku za modem pre flešovanja","Nemojte slepo vraćati stara podešavanja na novi firmver",{},{"id":380,"data":381,"type":42,"tunes":383},"zbt-fw-risk-heading",{"text":382,"level":234},"Zašto bi slepo flešovanje bilo greška",{},{"id":385,"data":386,"type":223,"tunes":388},"zbt-fw-risk-text-1",{"text":387},"Ruter nije običan stoni računar. On zavisi od specifične logike firmvera za ploču, inicijalizacije modema, kontrole napajanja, prebacivanja SIM kartica i podrške za stablo uređaja (device tree). Ako je jedan od ovih delova pogrešan, ruter se može pokrenuti, ali modem može prestati da radi ispravno. To bi bilo gore nego zadržavanje starije, ali funkcionalne verzije proizvođača.",{},{"id":390,"data":391,"type":223,"tunes":393},"zbt-fw-risk-text-2",{"text":392},"Noviji firmver je poboljšanje samo ako poboljšava ceo uređaj. Novije jezgro (kernel), noviji paketi i čistiji interfejs su korisni, ali ne po cenu gubitka 5G mreže, rada sa dve SIM kartice ili stabilnog oporavka.",{},{"id":395,"data":396,"type":42,"tunes":398},"zbt-fw-ideal-heading",{"text":397,"level":234},"Šta bi idealan firmver trebalo da pruži",{},{"id":400,"data":401,"type":223,"tunes":403},"zbt-fw-ideal-text",{"text":402},"Za ovaj tip rutera, idealan firmver bi kombinovao otvorenost OpenWrt-a sa snažnim upravljanjem modemom. To znači bolju dijagnostiku, kontrolisano ponašanje pri ponovnom povezivanju, SIM failover, zaključavanje opsega, watchdog logiku i bezbedan proces nadogradnje i vraćanja na prethodnu verziju.",{},{"id":405,"data":406,"type":265,"tunes":417},"zbt-fw-ideal-list",{"meta":407,"items":408,"style":264},{},[409,410,411,412,413,414,415,416],"Detaljna dijagnostika modema","Prikaz RSRP, RSRQ i SINR parametara","Zaključavanje opsega i kontrola mrežnog režima","Ručno i automatsko prebacivanje SIM kartica","Automatsko ponovno povezivanje i watchdog modema","Jasan proces oporavka","Dokumentovana putanja nadogradnje","Stabilna podrška za OpenWrt pakete",{},{"id":419,"data":420,"type":42,"tunes":422},"zbt-fw-business-heading",{"text":421,"level":234},"Firmver kao poslovni rizik",{},{"id":424,"data":425,"type":223,"tunes":427},"zbt-fw-business-text-1",{"text":426},"Za privatno testiranje, funkcionalan fabrički firmver je dovoljan za nastavak rada. Za dalju prodaju, brendiranje ili profesionalnu primenu, firmver postaje poslovni rizik. Dobra hardverska platforma može brzo izgubiti vrednost ako je firmver zastareo, nedokumentovan ili ga je teško oporaviti. Na ovom tržištu, jeftin hardver može postati skup ako su podrška i oporavak slabi.",{},{"id":429,"data":430,"type":223,"tunes":432},"zbt-fw-business-text-2",{"text":431},"Zato je putanja firmvera jednako važna kao i modem i kućište. Ozbiljna strategija proizvoda zahtevala bi stabilan osnovni firmver, testiranu metodu oporavka, jasno upravljanje izdanjima i realnu politiku podrške.",{},{"id":434,"data":435,"type":42,"tunes":437},"zbt-fw-next-heading",{"text":436,"level":234},"Sledeći testovi firmvera",{},{"id":439,"data":440,"type":223,"tunes":442},"zbt-fw-next-text",{"text":441},"Sledeći korak je prikupljanje više sistemskih informacija sa rutera i pažljivo poređenje mogućih opcija firmvera. Cilj nije brzo flešovanje, već razumevanje da li noviji sistem zasnovan na OpenWrt-u može poboljšati ruter bez stvaranja novih problema.",{},{"id":444,"data":445,"type":265,"tunes":455},"zbt-fw-next-list",{"meta":446,"items":447,"style":264},{},[448,449,450,451,452,453,454],"Prikupljanje informacija o ploči","Provera rasporeda particija","Verifikacija originalne slike firmvera","Testiranje pristupa oporavku","Evaluacija zvanične OpenWrt podrške","Evaluacija ROOter-a ili drugih OpenWrt varijanti fokusiranih na modeme","Dokumentovanje ponašanja SIM kartice i modema pre bilo kakve promene firmvera",{},{"id":457,"data":458,"type":42,"tunes":460},"zbt-fw-conclusion-heading",{"text":459,"level":234},"Zaključak",{},{"id":462,"data":463,"type":223,"tunes":465},"zbt-fw-conclusion-text-1",{"text":464},"Fabrički OpenWrt 21.02 firmver na ZBT Z8102AX je bolji nego što se očekivalo u jednom važnom pogledu: radi i ostao je stabilan tokom prvog testnog perioda. To čini ruter korisnim i daje hardveru fer šansu.",{},{"id":467,"data":468,"type":223,"tunes":470},"zbt-fw-conclusion-text-2",{"text":469},"U isto vreme, OpenWrt 21.02 nije komforno dugoročno rešenje. Ruteru je potrebno dublje testiranje firmvera, bolja vidljivost modema i proverena putanja nadogradnje pre nego što se može oceniti kao ozbiljna dugoročna platforma. Za sada, najbolja odluka je jasna: ne flešujte naslepo, prvo dokumentujte sve i tretirajte firmver kao najvažniju sledeću oblast testiranja.",{},"2.31","ZBT Z8102AX pokreće proizvođački modifikovanu verziju OpenWrt 21.02 sa kernelom 5.4.246. U praktičnom testiranju, firmver je uspešno radio i održao ruter stabilnim nekoliko dana, ali stara osnova pokreće važna pitanja o bezbednosti, kontroli modema, putevima nadogradnje i dugoročnoj mogućnosti održavanja.","\u002Fuploads\u002F2026\u002F06\u002Fopenwrt-router-review-dual-sim-04-1781620594653-uvf5oy.webp","openwrt-router-review-dual-sim-04-1781620594653-uvf5oy","PUBLISHED","2026-06-16T10:39:00.000Z","2026-06-16T14:39:24.467Z","2026-06-16T15:23:20.484Z",{"en":480,"de":481,"sr":482,"es":483,"fr":484,"it":485,"ru":486,"zh":487},"\u002Fblog\u002Fzbt-z8102ax-openwrt-2102-firmware-review","\u002Fde\u002Fblog\u002Fzbt-z8102ax-openwrt-2102-firmware-review","\u002Fsr\u002Fblog\u002Fzbt-z8102ax-openwrt-2102-firmware-review","\u002Fes\u002Fblog\u002Fzbt-z8102ax-openwrt-2102-firmware-review","\u002Ffr\u002Fblog\u002Fzbt-z8102ax-openwrt-2102-firmware-review","\u002Fit\u002Fblog\u002Fzbt-z8102ax-openwrt-2102-firmware-review","\u002Fru\u002Fblog\u002Fzbt-z8102ax-openwrt-2102-firmware-review","\u002Fzh\u002Fblog\u002Fzbt-z8102ax-openwrt-2102-firmware-review",[489,492,495,498],{"id":131,"name":490,"slug":491},"Router","router",{"id":146,"name":493,"slug":494},"Network","network",{"id":77,"name":496,"slug":497},"Hardware","hardware",{"id":499,"name":500,"slug":501},98,"Pregled poslije izdanja","post-release",{"id":503,"login":504,"email":505,"displayName":506},"20","rooth8233","aleksandar@stajic.de","Aleksandar Stajić",[508,726],{"lang":509,"title":510,"content":511,"contentJson":512,"excerpt":725},"en","ZBT Z8102AX OpenWrt 21.02 Firmware Review: Stable Enough, but Is It Future-Proof?","{\"time\":1781621235476,\"blocks\":[{\"id\":\"zbt-fw-title\",\"type\":\"header\",\"data\":{\"text\":\"ZBT Z8102AX OpenWrt 21.02 Firmware Review: Stable Enough, but Is It Future-Proof?\",\"level\":1},\"tunes\":{}},{\"id\":\"zbt-fw-intro-1\",\"type\":\"paragraph\",\"data\":{\"text\":\"The ZBT Z8102AX tested here runs a vendor-modified OpenWrt 21.02 firmware with kernel 5.4.246. That is an important detail. This is not a clean upstream OpenWrt installation, but a manufacturer-specific build adapted for this router, the Quectel RM500U-EA modem and the dual-SIM hardware.\"},\"tunes\":{}},{\"id\":\"zbt-fw-intro-2\",\"type\":\"paragraph\",\"data\":{\"text\":\"In the first test period, the firmware worked successfully and remained stable enough for practical use. The router reached several days of uptime, the modem came online, the SIM was recognized and the mobile connection worked. That is a good starting point. But firmware is not only about whether the router boots and connects. It is also about long-term updates, security, modem control, recovery and future-proofing.\"},\"tunes\":{}},{\"id\":\"zbt-fw-series-heading\",\"type\":\"header\",\"data\":{\"text\":\"Part of the ZBT Z8102AX Test Series\",\"level\":2},\"tunes\":{}},{\"id\":\"zbt-fw-series-text\",\"type\":\"paragraph\",\"data\":{\"text\":\"This article focuses on the firmware side of the ZBT Z8102AX. The main review is available at \u002Fblog\u002Fzbt-z8102ax-5g-openwrt-router-review. The hardware and packaging review is available at \u002Fblog\u002Fzbt-z8102ax-hardware-packaging-review. Further articles will cover the RM500U-EA modem, dual-SIM failover, buying decisions and the next step toward a stronger Wi-Fi 7 OpenWrt router.\"},\"tunes\":{}},{\"id\":\"zbt-fw-current-heading\",\"type\":\"header\",\"data\":{\"text\":\"Current Firmware State\",\"level\":2},\"tunes\":{}},{\"id\":\"zbt-fw-current-text-1\",\"type\":\"paragraph\",\"data\":{\"text\":\"The tested router identifies itself as ZBT-Z8102AX-2SIM. The firmware version shown in the interface is OpenWrt 21.02 25.1118_204421, running on kernel 5.4.246. The modem is detected as Quectel RM500U-EA. During the test, the router worked on the o2 Germany network with an observed LTE Band 3 and NR n28 connection.\"},\"tunes\":{}},{\"id\":\"zbt-fw-current-list\",\"type\":\"list\",\"data\":{\"style\":\"unordered\",\"meta\":{},\"items\":[\"Device model shown by firmware: ZBT-Z8102AX-2SIM\",\"Firmware base: OpenWrt 21.02\",\"Firmware build: 25.1118_204421\",\"Kernel version: 5.4.246\",\"Modem: Quectel RM500U-EA\",\"SIM status during test: ready\",\"Observed network: o2 Germany\",\"Observed connection: LTE Band 3 with NR n28\"]},\"tunes\":{}},{\"id\":\"zbt-fw-good-heading\",\"type\":\"header\",\"data\":{\"text\":\"What Works Well\",\"level\":2},\"tunes\":{}},{\"id\":\"zbt-fw-good-text-1\",\"type\":\"paragraph\",\"data\":{\"text\":\"The most important positive point is simple: the firmware works. The router boots, the modem is detected, the SIM is recognized, the APN can be used and the mobile connection comes online. During the first test period, the router remained stable enough for everyday testing and did not show a critical failure.\"},\"tunes\":{}},{\"id\":\"zbt-fw-good-text-2\",\"type\":\"paragraph\",\"data\":{\"text\":\"For a sample device, that is not a small thing. Many OEM routers look interesting on paper but fail in basic modem stability, poor SIM handling or unstable vendor firmware. In this case, the ZBT Z8102AX passed the first practical stability check.\"},\"tunes\":{}},{\"id\":\"zbt-fw-good-list\",\"type\":\"list\",\"data\":{\"style\":\"unordered\",\"meta\":{},\"items\":[\"Router boots and stays online\",\"RM500U-EA modem is detected\",\"SIM card is recognized\",\"Mobile connection works\",\"OpenWrt-based web interface is available\",\"Several days of stable uptime were observed\",\"Good enough for continued testing\"]},\"tunes\":{}},{\"id\":\"zbt-fw-limits-heading\",\"type\":\"header\",\"data\":{\"text\":\"Where the Firmware Feels Limited\",\"level\":2},\"tunes\":{}},{\"id\":\"zbt-fw-limits-text-1\",\"type\":\"paragraph\",\"data\":{\"text\":\"The weak point is not basic functionality. The weak point is control. The interface provides enough information to understand that the router is connected, but not enough deep modem visibility for serious testing. A 5G router should ideally show detailed signal values such as RSRP, RSRQ, SINR, cell information, band combinations and modem state in a clear way.\"},\"tunes\":{}},{\"id\":\"zbt-fw-limits-text-2\",\"type\":\"paragraph\",\"data\":{\"text\":\"The same applies to automation. A dual-SIM router becomes much more valuable when it can automatically switch from SIM1 to SIM2 based on connectivity, signal quality, operator failure or custom rules. This is exactly where a simple vendor interface often feels too limited.\"},\"tunes\":{}},{\"id\":\"zbt-fw-limits-list\",\"type\":\"list\",\"data\":{\"style\":\"unordered\",\"meta\":{},\"items\":[\"Limited modem diagnostics\",\"Unclear depth of dual-SIM automation\",\"No confirmed advanced SIM failover workflow yet\",\"Unclear band locking behavior\",\"Old OpenWrt base\",\"Old kernel base\",\"Unclear long-term update policy\"]},\"tunes\":{}},{\"id\":\"zbt-fw-openwrt21-heading\",\"type\":\"header\",\"data\":{\"text\":\"Is OpenWrt 21.02 Still Acceptable?\",\"level\":2},\"tunes\":{}},{\"id\":\"pcu3c1Shpz\",\"type\":\"image\",\"data\":{\"file\":{\"url\":\"\u002F_ipx\u002Ff_webp&q_85\u002Fuploads\u002F2026\u002F06\u002Fopenwrt-router-review-dual-sim-05-1781620596218-5ldld4.webp\"},\"caption\":\"\",\"meta\":{\"title\":\"AI generated image\",\"author\":\"AI\",\"copyright\":\"© Stajic Platform (AI generated)\",\"license\":\"AI-generated \u002F internal usage\",\"isAiGenerated\":true,\"sourceUrl\":null},\"withBorder\":false,\"withBackground\":false,\"stretched\":false},\"tunes\":{}},{\"id\":\"zbt-fw-openwrt21-text-1\",\"type\":\"paragraph\",\"data\":{\"text\":\"For a private test device, OpenWrt 21.02 can be acceptable if the router is stable, the modem works and the device is not exposed carelessly. In this first test, the firmware did its basic job. It connected, remained online and allowed the router to be used as a 5G network device.\"},\"tunes\":{}},{\"id\":\"zbt-fw-openwrt21-text-2\",\"type\":\"paragraph\",\"data\":{\"text\":\"For a professional product, however, OpenWrt 21.02 is not ideal as a long-term base. The problem is not only the version number. The problem is the combination of old base, vendor-specific changes, unclear update path and modem-specific hardware dependencies. A newer firmware is attractive, but only if it fully supports the exact hardware revision, modem power control, dual-SIM GPIO handling and recovery process.\"},\"tunes\":{}},{\"id\":\"zbt-fw-upgrade-heading\",\"type\":\"header\",\"data\":{\"text\":\"The Upgrade Question\",\"level\":2},\"tunes\":{}},{\"id\":\"zbt-fw-upgrade-text-1\",\"type\":\"paragraph\",\"data\":{\"text\":\"The manufacturer states that an upgrade to newer firmware is possible. That is good to hear, but it is not enough by itself. Before any firmware upgrade, the exact hardware revision, partition layout, recovery method and original factory image must be verified. A standard LuCI configuration backup is not a full system backup and cannot replace the original firmware image.\"},\"tunes\":{}},{\"id\":\"zbt-fw-upgrade-text-2\",\"type\":\"paragraph\",\"data\":{\"text\":\"The important question is not simply whether a newer image exists. The important question is whether the newer image supports this exact dual-SIM Z8102AX variant without breaking modem power, SIM switching, 5G operation or recovery.\"},\"tunes\":{}},{\"id\":\"zbt-fw-upgrade-list\",\"type\":\"list\",\"data\":{\"style\":\"unordered\",\"meta\":{},\"items\":[\"Confirm exact hardware revision\",\"Save the original manufacturer firmware image\",\"Export current configuration\",\"Document partition layout\",\"Verify recovery mode\",\"Check modem support before flashing\",\"Do not restore old settings blindly to a new firmware\"]},\"tunes\":{}},{\"id\":\"zbt-fw-risk-heading\",\"type\":\"header\",\"data\":{\"text\":\"Why Flashing Blindly Would Be a Mistake\",\"level\":2},\"tunes\":{}},{\"id\":\"zbt-fw-risk-text-1\",\"type\":\"paragraph\",\"data\":{\"text\":\"The router is not a generic desktop computer. It depends on board-specific firmware logic, modem initialization, power control, SIM switching and device tree support. If one of these parts is wrong, the router may still boot but the modem may stop working correctly. That would be worse than keeping an older but functional vendor build.\"},\"tunes\":{}},{\"id\":\"zbt-fw-risk-text-2\",\"type\":\"paragraph\",\"data\":{\"text\":\"A newer firmware is only an improvement if it improves the whole device. Newer kernel, newer packages and a cleaner interface are useful, but not at the cost of losing 5G, dual-SIM behavior or stable recovery.\"},\"tunes\":{}},{\"id\":\"zbt-fw-ideal-heading\",\"type\":\"header\",\"data\":{\"text\":\"What an Ideal Firmware Should Provide\",\"level\":2},\"tunes\":{}},{\"id\":\"zbt-fw-ideal-text\",\"type\":\"paragraph\",\"data\":{\"text\":\"For this type of router, the ideal firmware would combine the openness of OpenWrt with strong modem management. That means better diagnostics, controlled reconnect behavior, SIM failover, band locking, watchdog logic and a safe upgrade and rollback process.\"},\"tunes\":{}},{\"id\":\"zbt-fw-ideal-list\",\"type\":\"list\",\"data\":{\"style\":\"unordered\",\"meta\":{},\"items\":[\"Detailed modem diagnostics\",\"RSRP, RSRQ and SINR display\",\"Band locking and network mode control\",\"Manual and automatic SIM switching\",\"Automatic reconnect and modem watchdog\",\"Clear recovery process\",\"Documented upgrade path\",\"Stable OpenWrt package support\"]},\"tunes\":{}},{\"id\":\"zbt-fw-business-heading\",\"type\":\"header\",\"data\":{\"text\":\"Firmware as a Business Risk\",\"level\":2},\"tunes\":{}},{\"id\":\"zbt-fw-business-text-1\",\"type\":\"paragraph\",\"data\":{\"text\":\"For private testing, a functional vendor firmware is enough to continue. For resale, branding or professional deployment, firmware becomes a business risk. A good hardware platform can lose value quickly if the firmware is old, undocumented or difficult to recover. In this market, cheap hardware can become expensive if support and recovery are weak.\"},\"tunes\":{}},{\"id\":\"zbt-fw-business-text-2\",\"type\":\"paragraph\",\"data\":{\"text\":\"That is why the firmware path is just as important as the modem and the case. A serious product strategy would need a stable baseline firmware, a tested recovery method, clear release handling and a realistic support policy.\"},\"tunes\":{}},{\"id\":\"zbt-fw-next-heading\",\"type\":\"header\",\"data\":{\"text\":\"Next Firmware Tests\",\"level\":2},\"tunes\":{}},{\"id\":\"zbt-fw-next-text\",\"type\":\"paragraph\",\"data\":{\"text\":\"The next step is to collect more system information from the router and compare possible firmware options carefully. The goal is not to flash quickly, but to understand whether a newer OpenWrt-based system can improve the router without creating new problems.\"},\"tunes\":{}},{\"id\":\"zbt-fw-next-list\",\"type\":\"list\",\"data\":{\"style\":\"unordered\",\"meta\":{},\"items\":[\"Collect board information\",\"Check partition layout\",\"Verify original firmware image\",\"Test recovery access\",\"Evaluate official OpenWrt support\",\"Evaluate ROOter or other modem-focused OpenWrt variants\",\"Document SIM and modem behavior before any firmware change\"]},\"tunes\":{}},{\"id\":\"zbt-fw-conclusion-heading\",\"type\":\"header\",\"data\":{\"text\":\"Conclusion\",\"level\":2},\"tunes\":{}},{\"id\":\"zbt-fw-conclusion-text-1\",\"type\":\"paragraph\",\"data\":{\"text\":\"The vendor OpenWrt 21.02 firmware on the ZBT Z8102AX is better than expected in one important way: it works and remained stable during the first test period. That makes the router useful and gives the hardware a fair chance.\"},\"tunes\":{}},{\"id\":\"zbt-fw-conclusion-text-2\",\"type\":\"paragraph\",\"data\":{\"text\":\"At the same time, OpenWrt 21.02 is not a comfortable long-term answer. The router needs deeper firmware testing, better modem visibility and a verified upgrade path before it can be judged as a serious long-term platform. For now, the best decision is clear: do not flash blindly, document everything first and treat the firmware as the most important next test area.\"},\"tunes\":{}}],\"version\":\"2.31.5\"}",{"time":513,"blocks":514,"version":724},1781621235476,[515,518,522,526,530,534,538,542,554,558,562,566,578,582,586,590,602,606,615,619,623,627,631,635,647,651,655,659,663,667,680,684,688,692,696,700,712,716,720],{"id":215,"data":516,"type":42,"tunes":517},{"text":510,"level":40},{},{"id":220,"data":519,"type":223,"tunes":521},{"text":520},"The ZBT Z8102AX tested here runs a vendor-modified OpenWrt 21.02 firmware with kernel 5.4.246. That is an important detail. This is not a clean upstream OpenWrt installation, but a manufacturer-specific build adapted for this router, the Quectel RM500U-EA modem and the dual-SIM hardware.",{},{"id":226,"data":523,"type":223,"tunes":525},{"text":524},"In the first test period, the firmware worked successfully and remained stable enough for practical use. The router reached several days of uptime, the modem came online, the SIM was recognized and the mobile connection worked. That is a good starting point. But firmware is not only about whether the router boots and connects. It is also about long-term updates, security, modem control, recovery and future-proofing.",{},{"id":231,"data":527,"type":42,"tunes":529},{"text":528,"level":234},"Part of the ZBT Z8102AX Test Series",{},{"id":237,"data":531,"type":223,"tunes":533},{"text":532},"This article focuses on the firmware side of the ZBT Z8102AX. The main review is available at \u002Fblog\u002Fzbt-z8102ax-5g-openwrt-router-review. The hardware and packaging review is available at \u002Fblog\u002Fzbt-z8102ax-hardware-packaging-review. Further articles will cover the RM500U-EA modem, dual-SIM failover, buying decisions and the next step toward a stronger Wi-Fi 7 OpenWrt router.",{},{"id":242,"data":535,"type":42,"tunes":537},{"text":536,"level":234},"Current Firmware State",{},{"id":247,"data":539,"type":223,"tunes":541},{"text":540},"The tested router identifies itself as ZBT-Z8102AX-2SIM. The firmware version shown in the interface is OpenWrt 21.02 25.1118_204421, running on kernel 5.4.246. The modem is detected as Quectel RM500U-EA. During the test, the router worked on the o2 Germany network with an observed LTE Band 3 and NR n28 connection.",{},{"id":252,"data":543,"type":265,"tunes":553},{"meta":544,"items":545,"style":264},{},[546,547,548,549,260,550,551,552],"Device model shown by firmware: ZBT-Z8102AX-2SIM","Firmware base: OpenWrt 21.02","Firmware build: 25.1118_204421","Kernel version: 5.4.246","SIM status during test: ready","Observed network: o2 Germany","Observed connection: LTE Band 3 with NR n28",{},{"id":268,"data":555,"type":42,"tunes":557},{"text":556,"level":234},"What Works Well",{},{"id":273,"data":559,"type":223,"tunes":561},{"text":560},"The most important positive point is simple: the firmware works. The router boots, the modem is detected, the SIM is recognized, the APN can be used and the mobile connection comes online. During the first test period, the router remained stable enough for everyday testing and did not show a critical failure.",{},{"id":278,"data":563,"type":223,"tunes":565},{"text":564},"For a sample device, that is not a small thing. Many OEM routers look interesting on paper but fail in basic modem stability, poor SIM handling or unstable vendor firmware. In this case, the ZBT Z8102AX passed the first practical stability check.",{},{"id":283,"data":567,"type":265,"tunes":577},{"meta":568,"items":569,"style":264},{},[570,571,572,573,574,575,576],"Router boots and stays online","RM500U-EA modem is detected","SIM card is recognized","Mobile connection works","OpenWrt-based web interface is available","Several days of stable uptime were observed","Good enough for continued testing",{},{"id":296,"data":579,"type":42,"tunes":581},{"text":580,"level":234},"Where the Firmware Feels Limited",{},{"id":301,"data":583,"type":223,"tunes":585},{"text":584},"The weak point is not basic functionality. The weak point is control. The interface provides enough information to understand that the router is connected, but not enough deep modem visibility for serious testing. A 5G router should ideally show detailed signal values such as RSRP, RSRQ, SINR, cell information, band combinations and modem state in a clear way.",{},{"id":306,"data":587,"type":223,"tunes":589},{"text":588},"The same applies to automation. A dual-SIM router becomes much more valuable when it can automatically switch from SIM1 to SIM2 based on connectivity, signal quality, operator failure or custom rules. This is exactly where a simple vendor interface often feels too limited.",{},{"id":311,"data":591,"type":265,"tunes":601},{"meta":592,"items":593,"style":264},{},[594,595,596,597,598,599,600],"Limited modem diagnostics","Unclear depth of dual-SIM automation","No confirmed advanced SIM failover workflow yet","Unclear band locking behavior","Old OpenWrt base","Old kernel base","Unclear long-term update policy",{},{"id":324,"data":603,"type":42,"tunes":605},{"text":604,"level":234},"Is OpenWrt 21.02 Still Acceptable?",{},{"id":329,"data":607,"type":339,"tunes":614},{"file":608,"meta":610,"caption":338,"stretched":43,"withBorder":43,"withBackground":43},{"url":609},"\u002F_ipx\u002Ff_webp&q_85\u002Fuploads\u002F2026\u002F06\u002Fopenwrt-router-review-dual-sim-05-1781620596218-5ldld4.webp",{"title":611,"author":335,"license":612,"copyright":613,"sourceUrl":10,"isAiGenerated":14},"AI generated image","AI-generated \u002F internal usage","© Stajic Platform (AI generated)",{},{"id":342,"data":616,"type":223,"tunes":618},{"text":617},"For a private test device, OpenWrt 21.02 can be acceptable if the router is stable, the modem works and the device is not exposed carelessly. In this first test, the firmware did its basic job. It connected, remained online and allowed the router to be used as a 5G network device.",{},{"id":347,"data":620,"type":223,"tunes":622},{"text":621},"For a professional product, however, OpenWrt 21.02 is not ideal as a long-term base. The problem is not only the version number. The problem is the combination of old base, vendor-specific changes, unclear update path and modem-specific hardware dependencies. A newer firmware is attractive, but only if it fully supports the exact hardware revision, modem power control, dual-SIM GPIO handling and recovery process.",{},{"id":352,"data":624,"type":42,"tunes":626},{"text":625,"level":234},"The Upgrade Question",{},{"id":357,"data":628,"type":223,"tunes":630},{"text":629},"The manufacturer states that an upgrade to newer firmware is possible. That is good to hear, but it is not enough by itself. Before any firmware upgrade, the exact hardware revision, partition layout, recovery method and original factory image must be verified. A standard LuCI configuration backup is not a full system backup and cannot replace the original firmware image.",{},{"id":362,"data":632,"type":223,"tunes":634},{"text":633},"The important question is not simply whether a newer image exists. The important question is whether the newer image supports this exact dual-SIM Z8102AX variant without breaking modem power, SIM switching, 5G operation or recovery.",{},{"id":367,"data":636,"type":265,"tunes":646},{"meta":637,"items":638,"style":264},{},[639,640,641,642,643,644,645],"Confirm exact hardware revision","Save the original manufacturer firmware image","Export current configuration","Document partition layout","Verify recovery mode","Check modem support before flashing","Do not restore old settings blindly to a new firmware",{},{"id":380,"data":648,"type":42,"tunes":650},{"text":649,"level":234},"Why Flashing Blindly Would Be a Mistake",{},{"id":385,"data":652,"type":223,"tunes":654},{"text":653},"The router is not a generic desktop computer. It depends on board-specific firmware logic, modem initialization, power control, SIM switching and device tree support. If one of these parts is wrong, the router may still boot but the modem may stop working correctly. That would be worse than keeping an older but functional vendor build.",{},{"id":390,"data":656,"type":223,"tunes":658},{"text":657},"A newer firmware is only an improvement if it improves the whole device. Newer kernel, newer packages and a cleaner interface are useful, but not at the cost of losing 5G, dual-SIM behavior or stable recovery.",{},{"id":395,"data":660,"type":42,"tunes":662},{"text":661,"level":234},"What an Ideal Firmware Should Provide",{},{"id":400,"data":664,"type":223,"tunes":666},{"text":665},"For this type of router, the ideal firmware would combine the openness of OpenWrt with strong modem management. That means better diagnostics, controlled reconnect behavior, SIM failover, band locking, watchdog logic and a safe upgrade and rollback process.",{},{"id":405,"data":668,"type":265,"tunes":679},{"meta":669,"items":670,"style":264},{},[671,672,673,674,675,676,677,678],"Detailed modem diagnostics","RSRP, RSRQ and SINR display","Band locking and network mode control","Manual and automatic SIM switching","Automatic reconnect and modem watchdog","Clear recovery process","Documented upgrade path","Stable OpenWrt package support",{},{"id":419,"data":681,"type":42,"tunes":683},{"text":682,"level":234},"Firmware as a Business Risk",{},{"id":424,"data":685,"type":223,"tunes":687},{"text":686},"For private testing, a functional vendor firmware is enough to continue. For resale, branding or professional deployment, firmware becomes a business risk. A good hardware platform can lose value quickly if the firmware is old, undocumented or difficult to recover. In this market, cheap hardware can become expensive if support and recovery are weak.",{},{"id":429,"data":689,"type":223,"tunes":691},{"text":690},"That is why the firmware path is just as important as the modem and the case. A serious product strategy would need a stable baseline firmware, a tested recovery method, clear release handling and a realistic support policy.",{},{"id":434,"data":693,"type":42,"tunes":695},{"text":694,"level":234},"Next Firmware Tests",{},{"id":439,"data":697,"type":223,"tunes":699},{"text":698},"The next step is to collect more system information from the router and compare possible firmware options carefully. The goal is not to flash quickly, but to understand whether a newer OpenWrt-based system can improve the router without creating new problems.",{},{"id":444,"data":701,"type":265,"tunes":711},{"meta":702,"items":703,"style":264},{},[704,705,706,707,708,709,710],"Collect board information","Check partition layout","Verify original firmware image","Test recovery access","Evaluate official OpenWrt support","Evaluate ROOter or other modem-focused OpenWrt variants","Document SIM and modem behavior before any firmware change",{},{"id":457,"data":713,"type":42,"tunes":715},{"text":714,"level":234},"Conclusion",{},{"id":462,"data":717,"type":223,"tunes":719},{"text":718},"The vendor OpenWrt 21.02 firmware on the ZBT Z8102AX is better than expected in one important way: it works and remained stable during the first test period. That makes the router useful and gives the hardware a fair chance.",{},{"id":467,"data":721,"type":223,"tunes":723},{"text":722},"At the same time, OpenWrt 21.02 is not a comfortable long-term answer. The router needs deeper firmware testing, better modem visibility and a verified upgrade path before it can be judged as a serious long-term platform. For now, the best decision is clear: do not flash blindly, document everything first and treat the firmware as the most important next test area.",{},"2.31.5","The ZBT Z8102AX runs a vendor-modified OpenWrt 21.02 build with kernel 5.4.246. In practical testing, the firmware worked successfully and kept the router stable for several days, but the old base raises important questions about security, modem control, upgrade paths and long-term maintainability.",{"lang":7,"title":208,"content":210,"contentJson":727,"excerpt":472},{"time":212,"blocks":728,"version":471},[729,732,735,738,741,744,747,750,755,758,761,764,769,772,775,778,783,786,791,794,797,800,803,806,811,814,817,820,823,826,831,834,837,840,843,846,851,854,857],{"id":215,"data":730,"type":42,"tunes":731},{"text":217,"level":40},{},{"id":220,"data":733,"type":223,"tunes":734},{"text":222},{},{"id":226,"data":736,"type":223,"tunes":737},{"text":228},{},{"id":231,"data":739,"type":42,"tunes":740},{"text":233,"level":234},{},{"id":237,"data":742,"type":223,"tunes":743},{"text":239},{},{"id":242,"data":745,"type":42,"tunes":746},{"text":244,"level":234},{},{"id":247,"data":748,"type":223,"tunes":749},{"text":249},{},{"id":252,"data":751,"type":265,"tunes":754},{"meta":752,"items":753,"style":264},{},[256,257,258,259,260,261,262,263],{},{"id":268,"data":756,"type":42,"tunes":757},{"text":270,"level":234},{},{"id":273,"data":759,"type":223,"tunes":760},{"text":275},{},{"id":278,"data":762,"type":223,"tunes":763},{"text":280},{},{"id":283,"data":765,"type":265,"tunes":768},{"meta":766,"items":767,"style":264},{},[287,288,289,290,291,292,293],{},{"id":296,"data":770,"type":42,"tunes":771},{"text":298,"level":234},{},{"id":301,"data":773,"type":223,"tunes":774},{"text":303},{},{"id":306,"data":776,"type":223,"tunes":777},{"text":308},{},{"id":311,"data":779,"type":265,"tunes":782},{"meta":780,"items":781,"style":264},{},[315,316,317,318,319,320,321],{},{"id":324,"data":784,"type":42,"tunes":785},{"text":326,"level":234},{},{"id":329,"data":787,"type":339,"tunes":790},{"file":788,"meta":789,"caption":338,"stretched":43,"withBorder":43,"withBackground":43},{"url":332},{"title":334,"author":335,"license":336,"copyright":337,"sourceUrl":10,"isAiGenerated":14},{},{"id":342,"data":792,"type":223,"tunes":793},{"text":344},{},{"id":347,"data":795,"type":223,"tunes":796},{"text":349},{},{"id":352,"data":798,"type":42,"tunes":799},{"text":354,"level":234},{},{"id":357,"data":801,"type":223,"tunes":802},{"text":359},{},{"id":362,"data":804,"type":223,"tunes":805},{"text":364},{},{"id":367,"data":807,"type":265,"tunes":810},{"meta":808,"items":809,"style":264},{},[371,372,373,374,375,376,377],{},{"id":380,"data":812,"type":42,"tunes":813},{"text":382,"level":234},{},{"id":385,"data":815,"type":223,"tunes":816},{"text":387},{},{"id":390,"data":818,"type":223,"tunes":819},{"text":392},{},{"id":395,"data":821,"type":42,"tunes":822},{"text":397,"level":234},{},{"id":400,"data":824,"type":223,"tunes":825},{"text":402},{},{"id":405,"data":827,"type":265,"tunes":830},{"meta":828,"items":829,"style":264},{},[409,410,411,412,413,414,415,416],{},{"id":419,"data":832,"type":42,"tunes":833},{"text":421,"level":234},{},{"id":424,"data":835,"type":223,"tunes":836},{"text":426},{},{"id":429,"data":838,"type":223,"tunes":839},{"text":431},{},{"id":434,"data":841,"type":42,"tunes":842},{"text":436,"level":234},{},{"id":439,"data":844,"type":223,"tunes":845},{"text":441},{},{"id":444,"data":847,"type":265,"tunes":850},{"meta":848,"items":849,"style":264},{},[448,449,450,451,452,453,454],{},{"id":457,"data":852,"type":42,"tunes":853},{"text":459,"level":234},{},{"id":462,"data":855,"type":223,"tunes":856},{"text":464},{},{"id":467,"data":858,"type":223,"tunes":859},{"text":469},{},"Post erfolgreich abgerufen",{"items":862,"source":903,"manualIds":904,"manualMatchedIds":905},[863,870,877,884,891,897],{"id":864,"slug":865,"title":866,"excerpt":867,"featuredImage":868,"publishedAt":869},"456","zbt-z8102ax-hardware-packaging-review","ZBT Z8102AX recenzija hardvera i pakovanja: Snažan ruter, slaba kutija","ZBT Z8102AX ostavlja solidan prvi utisak kao tanak crni metalni 5G OpenWrt ruter sa više konektora za antene, dual-SIM slotovima, USB, LAN\u002FWAN portovima i praktičnim kompletom dodatne opreme. Hardver deluje korisno i ozbiljno, ali je pakovanje očigledno slaba tačka.","\u002Fuploads\u002F2026\u002F06\u002Fopenwrt-router-review-dual-sim-02-1781620590938-y33j4b.webp","2026-06-16T04:40:00.000Z",{"id":871,"slug":872,"title":873,"excerpt":874,"featuredImage":875,"publishedAt":876},"454","zbt-z8102ax-rm500u-ea-5g-modem-test","Quectel RM500U-EA u ZBT Z8102AX: 5G opsezi, o2 Nemačka i ponašanje signala u stvarnom svetu","ZBT Z8102AX koristi Quectel RM500U-EA modem za 4G i 5G povezivost. U prvom praktičnom testu, ruter se uspešno povezao na o2 Germany sa LTE Band 3 i NR n28. Modem radi, ali dublja dijagnostika poput RSRP, RSRQ, SINR, zaključavanja opsega i ponašanja ćelije još uvek zahteva odgovarajuće testiranje.","\u002Fuploads\u002F2026\u002F06\u002Fopenwrt-router-review-dual-sim-06-1781620597879-qay2sx.webp","2026-06-16T08:39:00.000Z",{"id":878,"slug":879,"title":880,"excerpt":881,"featuredImage":882,"publishedAt":883},"458","wifi7-openwrt-5g-router-next-step","Sledeći OpenWrt 5G ruter: Zašto su Wi-Fi 7, jači procesor i bolji firmver važni","ZBT Z8102AX je koristan prvi uzorak, ali sledeći korak bi trebalo da bude snažniji: Wi-Fi 7, moćnija četvorojezgarna platforma, bolja jasnoća firmvera, poboljšano pakovanje i stabilnija politika cena. Cilj nije samo još jedan 5G ruter, već bolje konfigurisan prosumer uređaj zasnovan na OpenWrt-u.","\u002Fuploads\u002F2026\u002F06\u002Fopenwrt-router-review-dual-sim-01-1781620588908-fwmzj7.webp","2026-06-16T10:41:00.000Z",{"id":885,"slug":886,"title":887,"excerpt":888,"featuredImage":889,"publishedAt":890},"455","zbt-z8102ax-dual-sim-failover-test","ZBT Z8102AX Dual-SIM failover: Šta radi, šta nedostaje i šta zahteva bolji firmver","ZBT Z8102AX je dual-SIM 5G OpenWrt ruter, ali sam dual-SIM hardver nije isto što i inteligentni failover. Ruter prepoznaje SIM karticu i uspešno se povezuje, ali automatsko prebacivanje, oporavak modema, odluke zasnovane na signalu i čista failover logika i dalje zahtevaju dublje testiranje.","\u002Fuploads\u002F2026\u002F06\u002Fopenwrt-router-review-dual-sim-03-1781620592829-7t77j7.webp","2026-06-16T10:40:00.000Z",{"id":892,"slug":893,"title":894,"excerpt":895,"featuredImage":896,"publishedAt":883},"457","should-you-buy-5g-openwrt-router-old-firmware","Treba li kupiti 5G OpenWrt ruter sa starim firmverom? ZBT Z8102AX kao praktičan primer","Kupovina 5G OpenWrt rutera sa starijim firmverom može imati smisla, ali samo pod pravim uslovima. ZBT Z8102AX jasno pokazuje obe strane: hardver je koristan, modem radi, a ruter je ostao stabilan u testiranju, ali OpenWrt 21.02, slabo pakovanje i nejasni putevi nadogradnje zahtevaju pažljivu odluku o kupovini.","\u002Fuploads\u002F2026\u002F06\u002Fopenwrt-router-review-dual-sim-05-1781620596218-5ldld4.webp",{"id":898,"slug":899,"title":900,"excerpt":901,"featuredImage":882,"publishedAt":902},"452","zbt-z8102ax-5g-openwrt-router-review-dual-sim-rm500u-ea-and-an-honest-assessment","Recenzija ZBT Z8102AX 5G OpenWrt rutera: Dual SIM, RM500U-EA i iskrena ocena","ZBT Z8102AX je neobičan 5G ruter sa OpenWrt osnovom, dual-SIM konceptom i Quectel RM500U-EA modemom. Na testiranju pokazuje jasne prednosti u fleksibilnosti, interfejsima i mobilnoj povezivosti, ali i tipične slabosti OpenWrt verzije koju je modifikovao proizvođač.","2026-06-16T07:34:00.000Z","fallback",[],[]]