I have been dealing with a loud screeching noise on calls since I got my Samsung S21 Ultra a couple of months ago and ported my number from Giffgaff. It happens intermittently but when it does happen it happens on all calls for a few hours which leav...

Been with virgin 1 week, never accessed voicemail before. When I call it the line is completely silent. I have 4 voicemails.  Any ideas? 

Requested my number be ported from GiffGaff to Virgin on 22 Nov told it would be complete by midnight 23rd. Total loss of service from 23rd to 26th. Told they were working on a known issue. Texts and Internet access became available from my giff gaff...