My main question is: what kind of system app decide which dialer will show the incoming calls?
I will shortly explain the situation. I have a smartwatch (zeblaze blitz with Android 5.1, no Android Wear, rooted) that has a bug in stock dialer, so I need to replace it.
I installed some dialers from play store, but they were using stock dialer for calls, so nothing.
I used root to install Google Dialer (put it in priv-app folder). It's working fine, except one thing.
When I get incoming calls, stock dialer shows up. If I answer, I hear nothing. I need to open Google dialer manually to talk.
If I uninstall or freeze stock dialer, on incoming calls, it rings but nothing appears at all. I need to open Google dialer manually to answer.
It seems some "setting" decide that incoming calls need to be shown by the default dialer, even if another one is set up to be used to talk.
Does anyone has an idea how to change this setting eventually?