I am having S21 ultra US version.. Using it in India.. I updated it to one ui 4.. Now data goes off while in call on my airtel Sim and JIO esim which is pure VoLTE, is not working..Checked the diagnostics and found that VoLTE provisioned flag is off ...
May be volte option is disabled after updates. Same happened after one ui 4 updates. As jio is pure VoLTE network it won't work. You will get configuration settings after few days and issue will be resolved. There's nothing wrong with your phone hard...
I don't know.. It was specific to me or not.. But I had sent error report from samsung member app.. And got the system configuration update flash message.. I clicked OK and after restart, issue for resolved..
