I have two SIM cards in my phone: one has T-Mobile's network using Mint as the MVNO, and the other has AT&T's network through Straight Talk as the MVNO provider. After the software update, the SIM card that connects to AT&T's network through Straight Talk no longer connects, but the T-Mobile one is still working fine. I tried swapping the SIM cards within the phone, so I know it's not the SIM slot, and I tried the AT&T SIM in another phone and it worked fine, so I know it's not my service or the SIM card. It also stopped connecting to AT&T's network immediately after the reboot that followed the update, and it was working fine 10 minutes earlier.
I called support and they said that they weren't aware of the issue, but that they would escalate it tomorrow. Please call them and let them know that you are experiencing it as well, otherwise they won't know that this is widespread.
US number: 1-888-678-3688
The broken update is Version WW-31.1010.0411.122, from 2022/09/07