iPhone 5se. Just updated to IOS 14.4
Took about an hour and rebooted multiple times but then got the "No Service" from the SIM.
After trying all of the above, the only thing that finally worked for me was removing the SIM card when the device was powered on. Rebooting with the SIM card still out.
Once it booted fully and I had entered my passcode, only then I inserted the SIM again and it started to work!
cocianain
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