@TP-Link I have some issue. my TL-MR6400 can't detect sim card. Even though I've use sim card in my smartphone and no problem, sim card can work. please help me ho to solve this problem Firmware...

Firmware Version:1.12.0 0.9.1 v0001.0 Build 190730 RC.59984n Hardware Version:TL-MR6400 v3 00000001

hi @Kevin_Z , i have same issue. I've already do step by step as per you recommendation. But my TL-MR6400 still can't detect sim card. Even I've already check the sim card using smartphone and it's...