I have an issue as well. Mine is rather wired. See the Screenshot(my screen protector is heavily scratched, I know). It says PR1.2 but the number in the brackets stands for PR1.1

Actually the phone is partly working. Most applications wont work, regardless they're stock one's or third party. I can't reinstall them because it says App is incompatible with other installed apps.

I'm puzzled.

I hv restarted two times -> still the same. I hv restored the phone -> still the same.
I don't hv dev mode anymore. Dev. apps are incompatible with other installed apps, the phone says.

Anybody had/has the same problem?