I updated my Samsung Galaxy Note 10+ 5G on Oct. 6, 2020 just after midnight. I then went to bed and after I woke up, I was getting a message saying “com.android.phone has stopped”. I dismiss it and it comes back again, every 10 seconds or so. At the top where the notification icons are, it says, “No SIM card - Emergency calls only”. I haven’t installed any other apps after the update, so that’s not the cause. I tried everything suggested in the link below except for factory resetting my phone. I’m trying to avoid that as I have a lot of data that can not be backed up because my phone isn’t rooted. Any suggestions would be greatly appreciated.
EDIT: I also went to the TMO store and got a new SIM card.