ZBT Z8102AX Dual-SIM Failover: What Works, What Is Missing and What Needs Better Firmware
The ZBT Z8102AX is a dual-SIM 5G OpenWrt router, but dual-SIM hardware alone is not the same as intelligent failover. The router recognizes the SIM and connects successfully, but automatic switching, modem recovery, signal-based decisions and clean failover logic still need deeper testing.