Fairphone 3 has no phone signal since update

[yvmuell]

This seem to be similar, a few more ideas to check in the other topic

FP3 connectivity issues

The Android 11 update came out on May 10th. This seems a strange problem. After updating to Android 11 there have been various problems relating to calls (low volume on Bluetooth, audio going to the loudspeaker instead of the earpiece, …) but I don’t recall having seen this one before. Also it’s not systematic. Just a few ideas: Is 4G Calling enabled? If so, maybe enable / disable this (might be helpful in some areas and not in others). Go to Settings > Network and Internet > Mobile network >…

Did you check the other Slot? Can you check with another SIM (is possible other provider)? How old is your SIM card? Did you check with your provider if there are any issues with your contract? Which provider did you use?