@bibo2710vn @Kevin_Z Try to contact Kevin_Z. He is always warm-hearte and he is always there to help others.

Thanks to everyone who helped me, this problem was finally solved. Thank you TP-LINK technical team.

@Kevin_Z Thank you for your assistance and reply, I have successfully updated TL-WR802N. But M7350 still fails. I have tried to connect with WIFI and USB Cable, but both failed. Don't know if it's my...

@Kevin_Z Hi, M7350 is (EU) Ver:4.1 TL-WR802N is (US) Ver:4.0 Good day.

@Kevin_Z They are all purchased in Taiwan. The system languages used are: English Is this situation regional (Taiwan)? Thanks for your response,

Hello, I also have this problem. Model: M7350 v4 Firmware version: 1.1.1 Build 170802 Rel.1009n Origin: China In addition, I have a WR802n (Model: TL-WR802N v4) that cannot be updated. Same...