Using Zoiper Free on Android. Works perfectly for audio only, but I purchased the video codec for videocalls and when I pick up the call with video the dialpad button disappears. Or when I pickup with audio only it works, but then add video, and the dialpad button disappears as well. I use it mainly to answer my doorphone, and need to send a code to open the door.
I tried other apps and they don't have this issue (but Zoiper seems to perform better for the rest)
Am I missing something ? Or is this different in the pro version ?