3CX app voice quality over wifi

[Frank86]

Several users have reported very low call quality using the 3CX app (v15.5 SP6) when their phone is connected to wifi (at home or other locations). If they switch wifi off, call quality is much better.

Is this common or just us?
Is the 3CX app using wifi when available?
If so, can the app be forced to bypass wifi without having to turn wifi off?

 

[OCT]

We are experiencing this same issue. Multiple customer reports and we are able to reproduce in our environment. Calls on WiFI, both iOS and Android, are poor quality. Calls on cell data are clear. The overall call quality sounds better on cell data as well. Almost like they are using a different codec.

 

[Ronald Klijsen]

Same problem here. We've updated to V16 and removed the codec GSM-fr.
Quality is better, but still many reports of hearable Echo while calling with the app.(Android 9)