Hi ASUS devs
I've written to Telenor Denmark about the issue - their (shortened) reply is as follows:
"Thank you for your inquiry I have just now discussed the case with our mobile-support team, who verified that we have activated the ability to call through WiFi and VoLTE. Therefore, it seems like you will need to activate the function on your new phone ...."
True - using the code #*#*3642623344*#*# - this has also worked previously on the device. However, after a reboot, the '4G Calling' function still needs to be reactivated and I want a permanent activation.
So, can you say whether a solution is with ASUS or Telenor.DK ?