Hello! I got a teracube 2 last month, and have been having the same problem: immediately when I make or accept a call, the screen goes dark and the buttons are unresponsive. This continues until the call is ended, which I cant do myself because of the locked screen, so the other person must hang up. This becomes more of an issue if I am connected to a robocall or phone tree that does not hang up.
I think the problem is not based on a software issue but based on the factory-installed screen protector triggering the proximity sensor. I have discovered two workarounds:
- I’d you press your thumb briefly against the proximity sensor and release, the screen unlocks.
- If you plug in headphones into the jack, the phone unlocks (I assume because the proximity sensor is not used during calls with headphones)