No Internet / mobile data while phoning

[Sirous]

REPRODUCIBILITY (% or how often): 97%
BUILD ID: 3.3.0.16 Rokua
HARDWARE (Jolla1, Tablet, XA2,…): Xperia 10
UI LANGUAGE: German
REGRESSION: (compared to previous public release: Yes, No, ?): I don’t know

DESCRIPTION:

I have no Internet / mobile data while i do phone with somebody. It’s almost always.
I found this topic from 2016 but it seems not be fixed since then?
https://together.jolla.com/question/150238/bug-jolla-c-drops-mobile-data-on-phone-calls/
As it concerns the main functions I hope it will get high priority.

ADDITIONAL INFORMATION:

If I can give you more important information, please ask me.

[Maus]

This is absolutely dependent on the active modem at the time of the call. If you’re on 2G, you can either have a phone call or IP traffic, not both. Please tell us more about the circumstances of the dysfunction you reported.

[peterleinchen]

Not fully true or always the case (which I needed to learn as well.
But in general I’d say this is closest to true.

See here

VoLTE support in SailfishOS?

Also false, but data over 2G is already not very much use. Combining CS and PS puts even further limitations of the rates you can achieve (and isn’t always supported) but technically, it works.

and following posts for details.