I contacted my Provider (o2) and they told me, that VoLTE is activated in my contract,
but I never had the Option listed in the Settings, it didn't mather which Android Version I had or now have.
Also every time I'm calling someone my 5G Network decreases to Edge Network and my Call Quality isn't very good. I even can't use the Internet while having a regular Phone Call.
FB Messenger Calls or WhatsApp Calls are far superior when it comes to the Quality, but I also know that this Calls are running through the LTE/5G Network like a regular VoLTE Call.
Is this normal here in Germany ( Europe ) ??
Does my Provider o2 offer VoLTE, but not for Asus Phones here in Germany?
I would appreciate any further information and thanking in advanced.