my module on zbt Z800ax cant detect sim can you email me latest module firmware
RM520N-GL
Your issue is probably unrelated to Quectel, you may need to select SIM card slot using GPIO, ask ZBT.
It’s not the modem firmware, the gateway firmware likely incorrectly sets the SIM GPIO to 1 but it needs to 0.
This is how it is on the v2 ZBT 8102AX hardware anyway, it’s incorrect in stock OpenWrt as is several other things I had to fix when porting OpenWrt to my gateway.