Have you tried to enable it on Telenor after enabling developer options and running this VoLTE code on your phone dialer?
How to activate VoLTE on your Xiaomi
So you can activate VoLTE on your Xiaomi.
VoLTE is generally disabled on our Xiaomi smartphones. To
activate VoLTE on a Xiaomi ,
Redmi or
POCO we only have to do the following steps:
- Dial * # * # 86583 # * # *. After that, the message " VoLTE Carrier check was disabled " will appear, thus activating VoLTE on our Xiaomi.
- Next we will go to Settings> SIM cards and mobile networks
- Once inside we will activate the option Use VoLTE.
- If our Xiaomi is a Dual SIM smartphone, the VoLTE option will be found in Settings> SIM cards and mobile networks> SIM1 / SIM2.
After
activating VoLTE in our Xiaomi we can make
voice calls in high definition through 4G, LTE or WiFi networks. That if everything depends on our coverage and if our operator has this service.