Not connecting to network

[RetiredTFD]

I have a s22 ultra and it recently decided not to connect to the cellular network.  ATT is our provider.  I can recieve texts and calls if on wifi calling but if no wifi is available then my phone is basically dead. I have reset (not factory) the phone, reset the network settings, tried to manually add the network, and even had the ATT store take the physical sim card out and install an Esim  The Esim  worked for about 24 hours and now the phone is back to not connecting.  Took it to a Samsung authorized repair shop they really didn't know what to do.  I have read it could be the antenna.  Phone was also recently updated 

[GaryB82]

The only option would be to contact support and send the device in for testing to see what the issue could be since you’ve already did everything else.

You can run the diagnostic tests in the support tab at the bottom of the members app to see what it says also

https://www.samsung.com/us/support/contact/

[Ivy67]

I have exactly the same problem with my s22 ultra and i cant firgure it out either. This is the forst time I have a problem with any of my samsung phones. Somebody told me to do a factory reset is the best option.

[RetiredTFD]

I don't want to loose all my apps and other things I have on the phone but may have to try factory reset 

[Ivy67]

Thats the reason I havent done the factory reset either but I guess Im going to have to do it. Good luck and let me know if anything works for you.

[Chuck620]

Turn off the WiFi calling option. Thsts most likely the problem. Turn the setting Off, then restart ur phone

[RetiredTFD]

I have done that as well. The problem is that its intermittent.  When I left the house today phone was not working had to connect to a mobile Hotspot to receive texts and calls.  Arrived at ATT store phone began working and us working fine as of now.  This is very puzzling.  

[Chuck620]

Could b your network provider. Are u getting a strong signal? Hope everything works out for u.