UI8/Android 16 update SIM not recognized.

[bwrite]

Galaxy S21FE 

After updating yesterday to Android 16/UI 8, my SIM card is no longer recognized. 

My phone tells me to insert a SIM card when 8 try and turn mobile networks on my phone diagnostics say the SIM card is good, just can't connect to a network. 

I can't make any changes as the 'Access Point Names' and 'Network Operators' are greyed out.

Also, when I go to check for system update it says there's no info about the latest update... And I get an error message if I try and run a check...

Did my update somehow get botched? His so I force a re-update?

I switched from Verizon to Mint Mobile 6 months ago, and this is my first major update since. but I bought the phone already unlocked. Did this update somehow reset it? Why can't I make changes like I did when I switched networks?

Will a factory reset get me around this? (Able to modify my access point and network?)

Desperate to not buy a new phone just yet 🥺

[leigh4x4]

Same phone updated this morning and now no signal

[justpeachy1]

Same phone with same issue and I don't want to do a factory reset if it won't even help. We need a new update! 

[tsmblacjman]

Yeah it doesn't. That's why I did a reflash of software with Odin and samfw for the firmware . And I saved my data while doing it.

[justpeachy1]

I have no idea how to do that or want to spend the time to learn it. I imagine most don't. Samsung should be fixing this. 

[tsmblacjman]

Yeah they should be. I agree. I didn't know either I'm 50 yrs old and tech isn't my thing . I tried phone shops and computer shops. No one could do anything but Sim card and reset phone. There is plenty of YouTube videos on this and once u download the program and phone image . It's legit point and click to do. I wish I was close I'd do it for anyone having the problem no charge.

[justpeachy1]

Just to leave an update, the factory reset did fix the phone for me. Seems to be working normally now.