Invalid [Poco F1/Beryllium]VoLTE not working, on Global it worked

[Sonnentag88]

Hello, I'm new here! I installed Xiaomi.EU Rom successfully on my device. I've done that, because I wanted to use face unlock. But, now I can't use VoLTE anymore. My carrier is o2 Germany. That's really disappointing, because VoLTE worked at the Global Rom. Please fix that soon!

 

[YeepYeep]

VoLTE is working just fine with O2 for me.

 

[Sonnentag88]

VoLTE is working just fine with O2 for me.

Do you have your SIM on Slot 1 or 2? Mine is in Slot 2, because I use a microSD.

 

[YeepYeep]

Do you have your SIM on Slot 1 or 2? Mine is in Slot 2, because I use a microSD.

In Slot 1.
I have an Mix 3 but i don't think this matter.

 

[Sonnentag88]

In Slot 1.
I have an Mix 3 but i don't think this matter.

I found the solution. I had to add "ims" to the APN-Type.

 

[YeepYeep]

Okay. I tried to put the SIM in Slot 1, that doesn't work. I can't understand that, on official global it worked, and on LineageOS and Resurrection Remix it also worked. Only this eu Rom seems to have that weird bug.

Try to disable the carrier check with this code *#*#86583#*#*
For me it worked.