I have virtual operator Fello (https://www.fello.se), which uses Telia’s network, but I get no id. How can I solve this?
In secondary slot I have Telenor SE (S58.1), but haven’t had any luck in register to VoLTE there.
Both operators support VoLTE according to their information.
Edit: and looking at operator support (VoLTE provider support) Fello is supported on the Xperia 10 III, so there has to be something I can do to fix this 