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21.02固件。经过数天测试，该设备运行成功且足够稳定，可满足实际使用需求。",0,"paragraph",{"id":225,"data":226,"type":223},"zbt-intro-2",{"text":227,"level":222},"本文是stajic.de小型路由器评测系列的第一部分。目标并非美化设备，而是记录其能力、优势、不足，以及此类路由器能否成为面向高级用户、移动办公、家庭实验室和5G故障切换场景的严肃OpenWrt准专业设备。",{"id":229,"data":230,"type":42},"zbt-series-heading",{"text":231,"level":232},"计划文章系列",2,{"id":234,"data":235,"type":223},"zbt-series-text",{"text":236,"level":222},"本评测计划作为一系列详细文章的入口。后续页面将深入探讨固件、调制解调器行为、双SIM卡处理、硬件质量、包装，以及迈向更强Wi-Fi 7 OpenWrt路由器的下一步。",{"id":238,"data":239,"type":247},"zbt-series-list",{"items":240,"style":246},[241,242,243,244,245],"ZBT Z8102AX OpenWrt 21.02固件评测：厂商构建、限制与升级问题 — \u002Fblog\u002Fzbt-z8102ax-openwrt-2102-firmware-review","ZBT Z8102AX RM500U-EA调制解调器测试：5G频段、信号质量与移动网络行为 — \u002Fblog\u002Fzbt-z8102ax-rm500u-ea-5g-modem-test","ZBT Z8102AX双SIM卡与故障切换：有效功能、缺失功能及固件改进需求 — \u002Fblog\u002Fzbt-z8102ax-dual-sim-failover-test","ZBT Z8102AX硬件与包装评测：端口、外壳、天线及初步物理印象 — \u002Fblog\u002Fzbt-z8102ax-hardware-packaging-review","下一步：Wi-Fi 7、更强CPU与更优OpenWrt 5G路由器配置 — \u002Fblog\u002Fwifi7-openwrt-5g-router-next-step","unordered","list",{"id":249,"data":250,"type":42},"zbt-tech-heading",{"text":251,"level":232},"技术基础",{"id":253,"data":254,"type":223},"zbt-tech-text-1",{"text":255,"level":222},"测试设备在界面中标识为ZBT-Z8102AX-2SIM。它运行制造商特定的OpenWrt 21.02构建版本，内核为5.4.246，并使用Quectel RM500U-EA作为4G和5G调制解调器。该设备基于联发科Filogic平台，属于Z8102AX路由器系列。",{"id":257,"data":258,"type":247},"zbt-tech-list",{"items":259,"style":246},[260,261,262,263,264,265,266,267],"固件显示型号：ZBT-Z8102AX-2SIM","固件：OpenWrt 21.02厂商构建","内核：5.4.246","调制解调器：Quectel RM500U-EA","SIM卡状态：就绪","测试期间观察到的运营商：德国o2","观察到的连接：LTE Band 3与NR n28","测试状态：成功运行且目前稳定",{"id":269,"data":270,"type":42},"zbt-arrival-heading",{"text":271,"level":232},"到货与首次测试期",{"id":273,"data":274,"type":223},"zbt-arrival-text-1",{"text":275,"level":222},"路由器于2026年5月27日到货，并测试至2026年6月16日。在首次测试期间，路由器运行成功且足够稳定，可满足实际使用。正常运行时间达到数天而无严重故障，这对于此类级别的样品设备而言是一个积极的初步信号。",{"id":277,"data":278,"type":223},"zbt-arrival-text-2",{"text":279,"level":222},"第一印象并非完美，但显然实用。该路由器并非精良的主流产品，但也绝非玩具。它是一个足够严肃的5G OpenWrt平台，值得继续测试。",{"id":281,"data":282,"type":42},"zbt-packaging-heading",{"text":283,"level":232},"包装：首个弱点",{"id":285,"data":286,"type":223},"zbt-packaging-text-1",{"text":287,"level":222},"最大的负面惊喜是包装。不幸的是，纸箱对于该设备的重量和形状而言过于薄弱柔软。路由器本身甚至没有锐利边缘，但仍能轻易穿透内部纸板模具并造成损坏。",{"id":289,"data":290,"type":223},"zbt-packaging-text-2",{"text":291,"level":222},"幸运的是，设备采用双层包装运输，因此路由器本身安全抵达。尽管如此，这是一个重要问题：技术良好的设备值得更好的包装，尤其是如果它打算在欧洲专业销售的话。",{"id":293,"data":294,"type":42},"zbt-firmware-heading",{"text":295,"level":232},"如今还能购买搭载OpenWrt 21的产品吗？",{"id":297,"data":298,"type":223},"zbt-firmware-text-1",{"text":299,"level":222},"这是核心问题之一。OpenWrt 21.02已显陈旧，且测试的固件并非纯净的上游OpenWrt版本，而是厂商特定构建。这并不自动意味着路由器糟糕。事实上，当前厂商固件功能正常且足够稳定以供测试。但这确实引发了关于安全更新、长期可维护性、调制解调器管理以及未来升级路径的问题。",{"id":301,"data":302,"type":223},"zbt-firmware-text-2",{"text":303,"level":222},"对于私人测试设备，如果系统工作正常、调制解调器稳定且设备未随意暴露，OpenWrt 21可以接受。对于专业产品或大规模部署，仅当固件路径清晰时方可接受：必须验证恢复镜像、升级方法、调制解调器支持、双SIM卡GPIO处理以及稳定回滚。",{"id":305,"data":306,"type":223},"zbt-firmware-text-3",{"text":307},"因此，接下来的测试将侧重于其他固件选项、调制解调器诊断、SIM卡故障切换、频段锁定，以及更现代的基于OpenWrt的系统能否在不破坏其5G和双SIM功能的情况下改进设备。",{"id":309,"data":310,"type":42},"zbt-strengths-heading",{"text":311,"level":232},"这款路由器的亮点",{"id":313,"data":314,"type":223},"zbt-strengths-text",{"text":315},"ZBT Z8102AX之所以有趣，是因为它介于消费级路由器和工业设备之间。它不像高端消费级路由器那样精致，但比市场上许多封闭的5G路由器更开放、更灵活、更具技术趣味性。",{"id":317,"data":318,"type":247},"zbt-strengths-list",{"items":319,"style":246},[320,321,322,323,324,325],"搭载RM500U-EA的5G调制解调器","双SIM卡硬件","基于OpenWrt的系统","多个以太网端口","适用于移动互联网、故障切换和家庭实验室场景","更适合高级用户而非初学者",{"id":327,"data":328,"type":42},"zbt-market-heading",{"text":329,"level":232},"市场价格与定位",{"id":331,"data":332,"type":223},"zbt-market-text-1",{"text":333},"这样的路由器不应被定位为一款廉价的塑料5G盒子。凭借OpenWrt、真正的5G调制解调器、双SIM卡硬件和多个以太网端口，其实际市场价值可达300至400欧元区间，具体取决于固件质量、文档、包装、保修和支持。",{"id":335,"data":336,"type":223},"zbt-market-text-2",{"text":337},"与此同时，这个市场可能会变得更加激烈。类似设备大量出现、卖家开始降价只是时间问题。但这并不自动意味着更高的价值。在这类硬件中，如果质量、包装、固件、恢复和调制解调器稳定性不佳，更便宜反而可能变得更昂贵。",{"id":339,"data":340,"type":42},"zbt-config-heading",{"text":341,"level":232},"选定配置与下一步硬件方向",{"id":343,"data":344,"type":223},"zbt-config-text-1",{"text":345},"本次测试单元选择了特定配置，搭载RM500U-EA调制解调器和双SIM卡硬件。下一步将不再是同等级别的路由器，而是一款更强大的Wi-Fi 7设备，配备更强劲的四核平台。目标是将这款初代样品与新一代设备进行比较，并希望下次能构建更好的配置。",{"id":347,"data":348,"type":223},"zbt-config-text-2",{"text":349},"如果此类设备要成为严肃产品战略的一部分，更稳定的定价策略、更清晰的固件路径和更好的包装至关重要。初代样品作为学习设备很有用。第二代样品应更接近未来方向：Wi-Fi 7、更强的CPU、更好的I\u002FO以及更成熟的OpenWrt设置。",{"id":351,"data":352,"type":42},"zbt-conclusion-heading",{"text":353,"level":232},"结论",{"id":355,"data":356,"type":223},"zbt-conclusion-text-1",{"text":357},"ZBT Z8102AX并不完美，但它是一款不错且有趣的硬件。在第一个测试周期中，它成功且相对稳定地运行。该设备证明了这类5G OpenWrt路由器具有真正的潜力，尤其适合高级用户、移动网络设置和故障切换场景。",{"id":359,"data":360,"type":223},"zbt-conclusion-text-2",{"text":361},"简陋的包装、陈旧的供应商固件以及不明确的长期升级路径，使其无法成为一款成熟的优质产品。但作为初代样品，它很有价值。后续文章将深入探讨固件、调制解调器行为、SIM卡故障切换、信号质量，以及更强大的Wi-Fi 7 OpenWrt路由器能否成为更好的长期发展方向。","2.31","ZBT Z8102AX是一款独特的5G路由器，采用OpenWrt基础系统、双SIM卡设计以及Quectel RM500U-EA调制解调器。在测试中，它在灵活性、接口和移动连接方面展现出明显优势，但也暴露出厂商定制版OpenWrt固件的典型缺陷。","\u002Fuploads\u002F2026\u002F06\u002Fopenwrt-router-review-dual-sim-01-1781620588908-fwmzj7.webp","openwrt-router-review-dual-sim-01-1781620588908-fwmzj7","PUBLISHED","2026-06-16T07:34:00.000Z","2026-06-16T13:34:22.870Z","2026-06-16T14:37:01.181Z",{"en":371,"de":372,"sr":373,"es":374,"fr":375,"it":376,"ru":377,"zh":378},"\u002Fblog\u002Fzbt-z8102ax-5g-openwrt-router-review-dual-sim-rm500u-ea-and-an-honest-assessment","\u002Fde\u002Fblog\u002Fzbt-z8102ax-5g-openwrt-router-review-dual-sim-rm500u-ea-and-an-honest-assessment","\u002Fsr\u002Fblog\u002Fzbt-z8102ax-5g-openwrt-router-review-dual-sim-rm500u-ea-and-an-honest-assessment","\u002Fes\u002Fblog\u002Fzbt-z8102ax-5g-openwrt-router-review-dual-sim-rm500u-ea-and-an-honest-assessment","\u002Ffr\u002Fblog\u002Fzbt-z8102ax-5g-openwrt-router-review-dual-sim-rm500u-ea-and-an-honest-assessment","\u002Fit\u002Fblog\u002Fzbt-z8102ax-5g-openwrt-router-review-dual-sim-rm500u-ea-and-an-honest-assessment","\u002Fru\u002Fblog\u002Fzbt-z8102ax-5g-openwrt-router-review-dual-sim-rm500u-ea-and-an-honest-assessment","\u002Fzh\u002Fblog\u002Fzbt-z8102ax-5g-openwrt-router-review-dual-sim-rm500u-ea-and-an-honest-assessment",[380,383,386],{"id":131,"name":381,"slug":382},"Router","router",{"id":146,"name":384,"slug":385},"Network","network",{"id":77,"name":387,"slug":388},"Hardware","hardware",{"id":390,"login":391,"email":392,"displayName":393},"20","rooth8233","aleksandar@stajic.de","Aleksandar Stajić",[395,515],{"lang":396,"title":397,"content":398,"contentJson":399,"excerpt":514},"en","ZBT Z8102AX 5G OpenWrt Router Review: Dual SIM, RM500U-EA and an Honest Assessment","{\"time\":1780000000000,\"blocks\":[{\"id\":\"zbt-title\",\"data\":{\"text\":\"ZBT Z8102AX 5G OpenWrt Router Review: Dual SIM, RM500U-EA and an Honest Assessment\",\"level\":1},\"type\":\"header\"},{\"id\":\"zbt-intro-1\",\"data\":{\"text\":\"The ZBT Z8102AX is not a typical consumer router. It is a 5G OpenWrt-based networking platform with a Quectel RM500U-EA modem, dual-SIM hardware, multiple Ethernet ports and a vendor-modified OpenWrt 21.02 firmware. After several days of testing, the unit has worked successfully and remained stable enough for practical use.\"},\"type\":\"paragraph\"},{\"id\":\"zbt-intro-2\",\"data\":{\"text\":\"This article is the first part of a small router test series on stajic.de. The goal is not to romanticize the device, but to document what it can do, where it is strong, where it is weak, and whether a router like this can become a serious OpenWrt-based prosumer device for advanced users, mobile office setups, homelabs and 5G failover scenarios.\"},\"type\":\"paragraph\"},{\"id\":\"zbt-series-heading\",\"data\":{\"text\":\"Planned Article Series\",\"level\":2},\"type\":\"header\"},{\"id\":\"zbt-series-text\",\"data\":{\"text\":\"This review is planned as the entry point for a small series of detailed articles. The following pages will go deeper into firmware, modem behavior, dual-SIM handling, hardware quality, packaging and the next step toward a stronger Wi-Fi 7 OpenWrt router.\"},\"type\":\"paragraph\"},{\"id\":\"zbt-series-list\",\"data\":{\"items\":[\"ZBT Z8102AX OpenWrt 21.02 Firmware Review: Vendor Build, Limits and Upgrade Questions — \u002Fblog\u002Fzbt-z8102ax-openwrt-2102-firmware-review\",\"ZBT Z8102AX RM500U-EA Modem Test: 5G Bands, Signal Quality and Mobile Network Behavior — \u002Fblog\u002Fzbt-z8102ax-rm500u-ea-5g-modem-test\",\"ZBT Z8102AX Dual-SIM and Failover: What Works, What Is Missing and What Needs Better Firmware — \u002Fblog\u002Fzbt-z8102ax-dual-sim-failover-test\",\"ZBT Z8102AX Hardware and Packaging Review: Ports, Case, Antennas and First Physical Impressions — \u002Fblog\u002Fzbt-z8102ax-hardware-packaging-review\",\"Next Step: Wi-Fi 7, Stronger CPU and a Better OpenWrt 5G Router Configuration — \u002Fblog\u002Fwifi7-openwrt-5g-router-next-step\"],\"style\":\"unordered\"},\"type\":\"list\"},{\"id\":\"zbt-tech-heading\",\"data\":{\"text\":\"Technical Foundation\",\"level\":2},\"type\":\"header\"},{\"id\":\"zbt-tech-text-1\",\"data\":{\"text\":\"The tested unit is identified in the interface as ZBT-Z8102AX-2SIM. It runs a manufacturer-specific OpenWrt 21.02 build with kernel 5.4.246 and uses the Quectel RM500U-EA as its 4G and 5G modem. The device is based on a MediaTek Filogic platform and belongs to the Z8102AX router family.\"},\"type\":\"paragraph\"},{\"id\":\"zbt-tech-list\",\"data\":{\"items\":[\"Model shown by firmware: ZBT-Z8102AX-2SIM\",\"Firmware: OpenWrt 21.02 vendor build\",\"Kernel: 5.4.246\",\"Modem: Quectel RM500U-EA\",\"SIM status: ready\",\"Observed operator during test: o2 Germany\",\"Observed connection: LTE Band 3 with NR n28\",\"Test status: successfully running and stable so far\"],\"style\":\"unordered\"},\"type\":\"list\"},{\"id\":\"zbt-arrival-heading\",\"data\":{\"text\":\"Arrival and First Test Period\",\"level\":2},\"type\":\"header\"},{\"id\":\"zbt-arrival-text-1\",\"data\":{\"text\":\"The router arrived on 27 May 2026 and has been tested until 16 June 2026. During this first test period, the router worked successfully and remained stable enough for practical use. The uptime reached several days without a critical failure, which is a positive first signal for a sample device in this class.\"},\"type\":\"paragraph\"},{\"id\":\"zbt-arrival-text-2\",\"data\":{\"text\":\"The first impression is not perfect, but it is clearly useful. The router is not a polished mainstream product, but it is also not a toy. It is a serious enough 5G OpenWrt platform to continue testing.\"},\"type\":\"paragraph\"},{\"id\":\"zbt-packaging-heading\",\"data\":{\"text\":\"Packaging: The First Weak Point\",\"level\":2},\"type\":\"header\"},{\"id\":\"zbt-packaging-text-1\",\"data\":{\"text\":\"The biggest negative surprise was the packaging. Unfortunately, the cardboard box was weak and too soft for a device of this weight and shape. The router itself does not even have sharp edges, but it still managed to push through the inner cardboard form and damage it easily.\"},\"type\":\"paragraph\"},{\"id\":\"zbt-packaging-text-2\",\"data\":{\"text\":\"Fortunately, the device was shipped in double packaging, so the router itself arrived safely. Still, this is an important point: a technically good device deserves better packaging, especially if it is ever meant to be sold professionally in Europe.\"},\"type\":\"paragraph\"},{\"id\":\"zbt-firmware-heading\",\"data\":{\"text\":\"Can a Product with OpenWrt 21 Still Be Bought Today?\",\"level\":2},\"type\":\"header\"},{\"id\":\"zbt-firmware-text-1\",\"data\":{\"text\":\"This is one of the central questions. OpenWrt 21.02 is old, and the tested firmware is not a clean upstream OpenWrt release, but a vendor-specific build. That does not automatically make the router bad. In fact, the current vendor firmware is functional and stable enough for testing. But it does raise questions about security updates, long-term maintainability, modem management and future upgrade paths.\"},\"type\":\"paragraph\"},{\"id\":\"zbt-firmware-text-2\",\"data\":{\"text\":\"For a private test device, OpenWrt 21 can be acceptable if the system works, the modem is stable and the device is not exposed carelessly. For a professional product or larger deployment, it is only acceptable if the firmware path is clear: recovery image, upgrade method, modem support, dual-SIM GPIO handling and stable rollback must be verified.\"},\"type\":\"paragraph\"},{\"id\":\"zbt-firmware-text-3\",\"data\":{\"text\":\"The next tests will therefore focus on other firmware options, modem diagnostics, SIM failover, band locking and whether a more modern OpenWrt-based system can improve the device without breaking its 5G and dual-SIM functionality.\"},\"type\":\"paragraph\"},{\"id\":\"zbt-strengths-heading\",\"data\":{\"text\":\"What Makes the Router Interesting\",\"level\":2},\"type\":\"header\"},{\"id\":\"zbt-strengths-text\",\"data\":{\"text\":\"The ZBT Z8102AX is interesting because it sits between consumer routers and industrial devices. It is not as polished as a premium consumer router, but it is more open, more flexible and more technically interesting than many closed 5G routers on the market.\"},\"type\":\"paragraph\"},{\"id\":\"zbt-strengths-list\",\"data\":{\"items\":[\"5G modem with RM500U-EA\",\"Dual-SIM hardware\",\"OpenWrt-based system\",\"Multiple Ethernet ports\",\"Useful for mobile internet, failover and homelab scenarios\",\"Better suited for advanced users than beginners\"],\"style\":\"unordered\"},\"type\":\"list\"},{\"id\":\"zbt-market-heading\",\"data\":{\"text\":\"Market Price and Positioning\",\"level\":2},\"type\":\"header\"},{\"id\":\"zbt-market-text-1\",\"data\":{\"text\":\"A router like this should not be positioned as a cheap plastic 5G box. With OpenWrt, a real 5G modem, dual-SIM hardware and multiple Ethernet ports, the realistic market value can move into the 300 to 400 EUR range, depending on firmware quality, documentation, packaging, warranty and support.\"},\"type\":\"paragraph\"},{\"id\":\"zbt-market-text-2\",\"data\":{\"text\":\"At the same time, this market will probably become more aggressive. It is only a matter of time before similar devices appear in larger numbers and sellers start reducing prices. But that does not automatically mean better value. In this kind of hardware, cheaper can easily become more expensive if quality, packaging, firmware, recovery and modem stability are weak.\"},\"type\":\"paragraph\"},{\"id\":\"zbt-config-heading\",\"data\":{\"text\":\"Selected Configuration and Next Hardware Step\",\"level\":2},\"type\":\"header\"},{\"id\":\"zbt-config-text-1\",\"data\":{\"text\":\"This test unit was selected in a specific configuration with the RM500U-EA modem and dual-SIM hardware. The next step will not be the same class of router again, but a stronger Wi-Fi 7 device with a more powerful four-core platform. The goal is to compare this first sample with a newer generation device and hopefully build a better configuration next time.\"},\"type\":\"paragraph\"},{\"id\":\"zbt-config-text-2\",\"data\":{\"text\":\"A more stable pricing policy, a cleaner firmware path and better packaging would be essential if such a device should ever become part of a serious product strategy. The first sample is useful as a learning device. The second sample should be closer to the future direction: Wi-Fi 7, stronger CPU, better I\u002FO and a more mature OpenWrt setup.\"},\"type\":\"paragraph\"},{\"id\":\"zbt-conclusion-heading\",\"data\":{\"text\":\"Conclusion\",\"level\":2},\"type\":\"header\"},{\"id\":\"zbt-conclusion-text-1\",\"data\":{\"text\":\"The ZBT Z8102AX is not perfect, but it is a good and interesting piece of hardware. It has worked successfully and relatively stable in the first test period. The device proves that this class of 5G OpenWrt router has real potential, especially for advanced users, mobile network setups and failover scenarios.\"},\"type\":\"paragraph\"},{\"id\":\"zbt-conclusion-text-2\",\"data\":{\"text\":\"The weak packaging, old vendor firmware and unclear long-term upgrade path prevent it from being a finished premium product. But as a first sample, it is valuable. The next articles will go deeper into firmware, modem behavior, SIM failover, signal quality and whether a stronger Wi-Fi 7 OpenWrt router can become the better long-term direction.\"},\"type\":\"paragraph\"}],\"version\":\"2.30.8\"}",{"time":400,"blocks":401,"version":513},1780000000000,[402,404,407,410,413,416,424,427,430,441,444,447,450,453,456,459,462,465,468,471,474,477,486,489,492,495,498,501,504,507,510],{"id":215,"data":403,"type":42},{"text":397,"level":40},{"id":219,"data":405,"type":223},{"text":406},"The ZBT Z8102AX is not a typical consumer router. It is a 5G OpenWrt-based networking platform with a Quectel RM500U-EA modem, dual-SIM hardware, multiple Ethernet ports and a vendor-modified OpenWrt 21.02 firmware. After several days of testing, the unit has worked successfully and remained stable enough for practical use.",{"id":225,"data":408,"type":223},{"text":409},"This article is the first part of a small router test series on stajic.de. The goal is not to romanticize the device, but to document what it can do, where it is strong, where it is weak, and whether a router like this can become a serious OpenWrt-based prosumer device for advanced users, mobile office setups, homelabs and 5G failover scenarios.",{"id":229,"data":411,"type":42},{"text":412,"level":232},"Planned Article Series",{"id":234,"data":414,"type":223},{"text":415},"This review is planned as the entry point for a small series of detailed articles. The following pages will go deeper into firmware, modem behavior, dual-SIM handling, hardware quality, packaging and the next step toward a stronger Wi-Fi 7 OpenWrt router.",{"id":238,"data":417,"type":247},{"items":418,"style":246},[419,420,421,422,423],"ZBT Z8102AX OpenWrt 21.02 Firmware Review: Vendor Build, Limits and Upgrade Questions — \u002Fblog\u002Fzbt-z8102ax-openwrt-2102-firmware-review","ZBT Z8102AX RM500U-EA Modem Test: 5G Bands, Signal Quality and Mobile Network Behavior — \u002Fblog\u002Fzbt-z8102ax-rm500u-ea-5g-modem-test","ZBT Z8102AX Dual-SIM and Failover: What Works, What Is Missing and What Needs Better Firmware — \u002Fblog\u002Fzbt-z8102ax-dual-sim-failover-test","ZBT Z8102AX Hardware and Packaging Review: Ports, Case, Antennas and First Physical Impressions — \u002Fblog\u002Fzbt-z8102ax-hardware-packaging-review","Next Step: Wi-Fi 7, Stronger CPU and a Better OpenWrt 5G Router Configuration — \u002Fblog\u002Fwifi7-openwrt-5g-router-next-step",{"id":249,"data":425,"type":42},{"text":426,"level":232},"Technical Foundation",{"id":253,"data":428,"type":223},{"text":429},"The tested unit is identified in the interface as ZBT-Z8102AX-2SIM. It runs a manufacturer-specific OpenWrt 21.02 build with kernel 5.4.246 and uses the Quectel RM500U-EA as its 4G and 5G modem. The device is based on a MediaTek Filogic platform and belongs to the Z8102AX router family.",{"id":257,"data":431,"type":247},{"items":432,"style":246},[433,434,435,436,437,438,439,440],"Model shown by firmware: ZBT-Z8102AX-2SIM","Firmware: OpenWrt 21.02 vendor build","Kernel: 5.4.246","Modem: Quectel RM500U-EA","SIM status: ready","Observed operator during test: o2 Germany","Observed connection: LTE Band 3 with NR n28","Test status: successfully running and stable so far",{"id":269,"data":442,"type":42},{"text":443,"level":232},"Arrival and First Test Period",{"id":273,"data":445,"type":223},{"text":446},"The router arrived on 27 May 2026 and has been tested until 16 June 2026. During this first test period, the router worked successfully and remained stable enough for practical use. The uptime reached several days without a critical failure, which is a positive first signal for a sample device in this class.",{"id":277,"data":448,"type":223},{"text":449},"The first impression is not perfect, but it is clearly useful. The router is not a polished mainstream product, but it is also not a toy. It is a serious enough 5G OpenWrt platform to continue testing.",{"id":281,"data":451,"type":42},{"text":452,"level":232},"Packaging: The First Weak Point",{"id":285,"data":454,"type":223},{"text":455},"The biggest negative surprise was the packaging. Unfortunately, the cardboard box was weak and too soft for a device of this weight and shape. The router itself does not even have sharp edges, but it still managed to push through the inner cardboard form and damage it easily.",{"id":289,"data":457,"type":223},{"text":458},"Fortunately, the device was shipped in double packaging, so the router itself arrived safely. Still, this is an important point: a technically good device deserves better packaging, especially if it is ever meant to be sold professionally in Europe.",{"id":293,"data":460,"type":42},{"text":461,"level":232},"Can a Product with OpenWrt 21 Still Be Bought Today?",{"id":297,"data":463,"type":223},{"text":464},"This is one of the central questions. OpenWrt 21.02 is old, and the tested firmware is not a clean upstream OpenWrt release, but a vendor-specific build. That does not automatically make the router bad. In fact, the current vendor firmware is functional and stable enough for testing. But it does raise questions about security updates, long-term maintainability, modem management and future upgrade paths.",{"id":301,"data":466,"type":223},{"text":467},"For a private test device, OpenWrt 21 can be acceptable if the system works, the modem is stable and the device is not exposed carelessly. For a professional product or larger deployment, it is only acceptable if the firmware path is clear: recovery image, upgrade method, modem support, dual-SIM GPIO handling and stable rollback must be verified.",{"id":305,"data":469,"type":223},{"text":470},"The next tests will therefore focus on other firmware options, modem diagnostics, SIM failover, band locking and whether a more modern OpenWrt-based system can improve the device without breaking its 5G and dual-SIM functionality.",{"id":309,"data":472,"type":42},{"text":473,"level":232},"What Makes the Router Interesting",{"id":313,"data":475,"type":223},{"text":476},"The ZBT Z8102AX is interesting because it sits between consumer routers and industrial devices. It is not as polished as a premium consumer router, but it is more open, more flexible and more technically interesting than many closed 5G routers on the market.",{"id":317,"data":478,"type":247},{"items":479,"style":246},[480,481,482,483,484,485],"5G modem with RM500U-EA","Dual-SIM hardware","OpenWrt-based system","Multiple Ethernet ports","Useful for mobile internet, failover and homelab scenarios","Better suited for advanced users than beginners",{"id":327,"data":487,"type":42},{"text":488,"level":232},"Market Price and Positioning",{"id":331,"data":490,"type":223},{"text":491},"A router like this should not be positioned as a cheap plastic 5G box. With OpenWrt, a real 5G modem, dual-SIM hardware and multiple Ethernet ports, the realistic market value can move into the 300 to 400 EUR range, depending on firmware quality, documentation, packaging, warranty and support.",{"id":335,"data":493,"type":223},{"text":494},"At the same time, this market will probably become more aggressive. It is only a matter of time before similar devices appear in larger numbers and sellers start reducing prices. But that does not automatically mean better value. In this kind of hardware, cheaper can easily become more expensive if quality, packaging, firmware, recovery and modem stability are weak.",{"id":339,"data":496,"type":42},{"text":497,"level":232},"Selected Configuration and Next Hardware Step",{"id":343,"data":499,"type":223},{"text":500},"This test unit was selected in a specific configuration with the RM500U-EA modem and dual-SIM hardware. The next step will not be the same class of router again, but a stronger Wi-Fi 7 device with a more powerful four-core platform. The goal is to compare this first sample with a newer generation device and hopefully build a better configuration next time.",{"id":347,"data":502,"type":223},{"text":503},"A more stable pricing policy, a cleaner firmware path and better packaging would be essential if such a device should ever become part of a serious product strategy. The first sample is useful as a learning device. The second sample should be closer to the future direction: Wi-Fi 7, stronger CPU, better I\u002FO and a more mature OpenWrt setup.",{"id":351,"data":505,"type":42},{"text":506,"level":232},"Conclusion",{"id":355,"data":508,"type":223},{"text":509},"The ZBT Z8102AX is not perfect, but it is a good and interesting piece of hardware. It has worked successfully and relatively stable in the first test period. The device proves that this class of 5G OpenWrt router has real potential, especially for advanced users, mobile network setups and failover scenarios.",{"id":359,"data":511,"type":223},{"text":512},"The weak packaging, old vendor firmware and unclear long-term upgrade path prevent it from being a finished premium product. But as a first sample, it is valuable. The next articles will go deeper into firmware, modem behavior, SIM failover, signal quality and whether a stronger Wi-Fi 7 OpenWrt router can become the better long-term direction.","2.30.8","The ZBT Z8102AX is an unusual 5G router with an OpenWrt base, a dual-SIM concept, and a Quectel RM500U-EA modem. In testing, it shows clear strengths in flexibility, interfaces, and mobile connectivity, but also the typical weaknesses of a vendor-modified OpenWrt build.",{"lang":7,"title":208,"content":210,"contentJson":516,"excerpt":363},{"time":212,"blocks":517,"version":362},[518,520,522,524,526,528,531,533,535,538,540,542,544,546,548,550,552,554,556,558,560,562,565,567,569,571,573,575,577,579,581],{"id":215,"data":519,"type":42},{"text":217,"level":40},{"id":219,"data":521,"type":223},{"text":221,"level":222},{"id":225,"data":523,"type":223},{"text":227,"level":222},{"id":229,"data":525,"type":42},{"text":231,"level":232},{"id":234,"data":527,"type":223},{"text":236,"level":222},{"id":238,"data":529,"type":247},{"items":530,"style":246},[241,242,243,244,245],{"id":249,"data":532,"type":42},{"text":251,"level":232},{"id":253,"data":534,"type":223},{"text":255,"level":222},{"id":257,"data":536,"type":247},{"items":537,"style":246},[260,261,262,263,264,265,266,267],{"id":269,"data":539,"type":42},{"text":271,"level":232},{"id":273,"data":541,"type":223},{"text":275,"level":222},{"id":277,"data":543,"type":223},{"text":279,"level":222},{"id":281,"data":545,"type":42},{"text":283,"level":232},{"id":285,"data":547,"type":223},{"text":287,"level":222},{"id":289,"data":549,"type":223},{"text":291,"level":222},{"id":293,"data":551,"type":42},{"text":295,"level":232},{"id":297,"data":553,"type":223},{"text":299,"level":222},{"id":301,"data":555,"type":223},{"text":303,"level":222},{"id":305,"data":557,"type":223},{"text":307},{"id":309,"data":559,"type":42},{"text":311,"level":232},{"id":313,"data":561,"type":223},{"text":315},{"id":317,"data":563,"type":247},{"items":564,"style":246},[320,321,322,323,324,325],{"id":327,"data":566,"type":42},{"text":329,"level":232},{"id":331,"data":568,"type":223},{"text":333},{"id":335,"data":570,"type":223},{"text":337},{"id":339,"data":572,"type":42},{"text":341,"level":232},{"id":343,"data":574,"type":223},{"text":345},{"id":347,"data":576,"type":223},{"text":349},{"id":351,"data":578,"type":42},{"text":353,"level":232},{"id":355,"data":580,"type":223},{"text":357},{"id":359,"data":582,"type":223},{"text":361},"Post erfolgreich abgerufen",{"items":585,"source":626,"manualIds":627,"manualMatchedIds":628},[586,593,598,605,612,619],{"id":587,"slug":588,"title":589,"excerpt":590,"featuredImage":591,"publishedAt":592},"457","should-you-buy-5g-openwrt-router-old-firmware","你应该购买带有旧固件的5G OpenWrt路由器吗？以ZBT Z8102AX为例","购买搭载旧版固件的5G OpenWrt路由器在特定条件下是合理的。ZBT Z8102AX型号清晰展现了利弊两面：硬件实用、调制解调器工作正常，测试中路由器保持稳定，但OpenWrt 21.02版本、简陋的包装以及不明确的升级路径，要求消费者在购买时需审慎决策。","\u002Fuploads\u002F2026\u002F06\u002Fopenwrt-router-review-dual-sim-05-1781620596218-5ldld4.webp","2026-06-16T10:41:00.000Z",{"id":594,"slug":595,"title":596,"excerpt":597,"featuredImage":364,"publishedAt":592},"458","wifi7-openwrt-5g-router-next-step","下一代OpenWrt 5G路由器：为何Wi-Fi 7、更强CPU与更优固件至关重要","ZBT Z8102AX 是一个有用的初步样品，但下一步应该更强：Wi-Fi 7、更强大的四核平台、更清晰的固件、改进的包装以及更稳定的定价策略。目标不仅仅是另一款5G路由器，而是一款配置更优、基于OpenWrt的准专业级设备。",{"id":599,"slug":600,"title":601,"excerpt":602,"featuredImage":603,"publishedAt":604},"455","zbt-z8102ax-dual-sim-failover-test","ZBT Z8102AX 双SIM卡故障切换：有效功能、缺失功能及固件需改进之处","ZBT Z8102AX是一款双SIM卡5G OpenWrt路由器，但仅具备双SIM卡硬件并不等同于智能故障切换。该路由器能识别SIM卡并成功连接，但自动切换、调制解调器恢复、基于信号的决策以及清晰的故障切换逻辑仍需更深入的测试。","\u002Fuploads\u002F2026\u002F06\u002Fopenwrt-router-review-dual-sim-03-1781620592829-7t77j7.webp","2026-06-16T10:40:00.000Z",{"id":606,"slug":607,"title":608,"excerpt":609,"featuredImage":610,"publishedAt":611},"453","zbt-z8102ax-openwrt-2102-firmware-review","ZBT Z8102AX OpenWrt 21.02 固件评测：足够稳定，但能否面向未来？","ZBT Z8102AX 运行的是厂商修改版 OpenWrt 21.02 固件，内核版本为 5.4.246。实际测试中，该固件运行稳定，可保持路由器连续数日正常工作，但老旧的基础版本引发了关于安全性、调制解调器控制、升级路径及长期可维护性的重要问题。","\u002Fuploads\u002F2026\u002F06\u002Fopenwrt-router-review-dual-sim-04-1781620594653-uvf5oy.webp","2026-06-16T10:39:00.000Z",{"id":613,"slug":614,"title":615,"excerpt":616,"featuredImage":617,"publishedAt":618},"456","zbt-z8102ax-hardware-packaging-review","ZBT Z8102AX 硬件与包装评测：强劲路由器，薄弱包装","ZBT Z8102AX 作为一款纤薄黑色金属5G OpenWrt路由器，配备多个天线接口、双SIM卡槽、USB、LAN\u002FWAN端口及实用配件套装，给人留下扎实的第一印象。硬件设计实用且专业，但包装显然是薄弱环节。","\u002Fuploads\u002F2026\u002F06\u002Fopenwrt-router-review-dual-sim-02-1781620590938-y33j4b.webp","2026-06-16T04:40:00.000Z",{"id":620,"slug":621,"title":622,"excerpt":623,"featuredImage":624,"publishedAt":625},"454","zbt-z8102ax-rm500u-ea-5g-modem-test","Quectel RM500U-EA在ZBT Z8102AX中：5G频段、o2德国及实际信号表现","ZBT Z8102AX 使用移远 RM500U-EA 调制解调器实现 4G 和 5G 连接。在首次实际测试中，该路由器成功连接至德国 o2 网络，使用 LTE Band 3 和 NR n28 频段。调制解调器工作正常，但更深层次的诊断功能如 RSRP、RSRQ、SINR、频段锁定及小区行为仍需进一步测试。","\u002Fuploads\u002F2026\u002F06\u002Fopenwrt-router-review-dual-sim-06-1781620597879-qay2sx.webp","2026-06-16T08:39:00.000Z","fallback",[],[]]