Tried out 2.0.0-2. I had the same bugs I mentioned for 2.0.0-1, plus the inability to save conf when exiting the settings menu. I also couldnt get into the settings menu sometimes, like kavekave mentioned.

I rebooted a couple times and it started working as it should.

However I'm not sure how the notification option works. I don't have a checkmark on Notifications and recaller tells me when I'm connecting and disconnecting to a call. Recaller isn't even on or green.