C2 Volte Germany with Congstar - how to make it work?

Hi,

i there any ongoing work to make Volte work with providers, it does not yet work with. I am Germany and using Congstar. Volte is not working. When performing a phone call, the network always falls back to 2 or 2.5 G - a decent voice is not really possible - you can be happy if you can understand the other participant in the phone call….

What is need to make phone calls with Volte work with Congstar in Germany? I am willing to help providing information (logs, whatever, if instructed), so somebody can have a look at it and fix the problem. Since Volte is working in general, i assume this is only a “configuration issue”, at least i hope so.

Thanks in advance

Cheers,

Andreas

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