I have a BV5800Pro, bought in Germany 2 months ago.
All was good, but no the problem starts:
1. mobile data always looses connection. have to switch off and on the mobile data, then it works for 5 minutes...then off again.
2. the cell phone restarts a few times per day, on its own. I do not initiate the restart.
3. Apps like chrome, messenger, whatsapp just shut down in the middle of using them.
4. Very high battery consumption. 3 minutes chat in messenger uses 1% battery life.
can someone help?