Sim card is not detected and phone is lagging

[Aniket8113]

After my recent software upgrade, my phone is lagging and Sim card is not getting detected. I tried this sim on other phone it works fine. My fine is S21 FE

[Atharva95]

Koi bhi major update ke baad phone ka backup leke format karna accha rehta to get rid of bugs like this

[goodthings]

Kindly reset factory data with backup then try to it's again. If you like please accept as a solution it's help to others users also, click on 3dots in my reply section and click on accept solution. Thanks.

[goodthings]

You're welcome to here.