I like to use Zoiper on my Samsung S5 Neo with Android 5.1.1 but still have a serious problem and I have tried different options yet. That's it:
The app dials, the opposite answers. The sound on the oposite is perfect, but on my side the audio is choppy - from the beginning, including the dialing tone.
I have tried it from different locations connecting different routers - it makes no difference. I switched from UDP to TCP - doesn's work with my phone provider (tng.de).
Now I decided to give Zoiper a last chance. If there is no solution, I will have to uninstall it.
Could anybody help me, please?
Thank you very much