Ahhh... now new one. After upgrade 4.1 WI FI auto trun off.  

I have seen many issues of people post there, different model different problems, no one care. Security patch comes lately.  And my phone already has dozon of issues after purchase. 

After December 2021 update my phone get sim network issues . No sim registered on network. I have post some posts here. Nothing helps. Im waiting android 12 or January 2022 update. 

Can anyone share when Android 12 available In Bangladesh for sumsang m31 

AFTER LAST UPDATES PHONE SIM CARD NOT REGISTERED IN NETWORK SHOWING.TRIED OF RESTORED, RESET, CHANGING SIM, EVERYTHING. NOT EVEN OK AFTER FACTORY RESET.VERY UPSET WITH SAMSUNG. FROM BEGINNING IT HAS LOTS OF ISSUES, NOW THE MAJOR ONE.WARRANTY EXPIRED ...