Xperia 1 Phone calls problems after Android 11

[tsypien]

I have to restart my Xperia 1 phone every time when want to make a phone call. When someone calling me I nothing happens on my phone. After restarting it is fine for some time.

It started after upgrading to Android 11.

Anyone noticed that problem? 

[Strampke]

So an O2 SIM card works fine?

The take up contact with your own provider and ask.

You can also ask the provider to send you another SIM card.

Smartphones in general tend to behave strange with faulty SIM cards and faulty SD cards.

Check both.

[tsypien]

Unfortunately after SIM card replacement and all checks done by Three network there's still the same problem. They said there's a problem with phone. So after updating to android 11 phone doesn't work properly with Three network and freezing phone calls. 

I don't want to change the phone as I really like Sony Xperia for photography, video and music. What's the solution?

[Strampke]

So it's just Three network?

Mmmm, I'm at a loss here.

See if an update will bring relief.

Anyway, my Xperia 1 is on the same software release as yours and doesn't show this kind of behaviour.