I bought my bv8000 pro ten months ago and only today I realize that the screen rotation has stopped working, so when you turn the screen it remains in portrait mode, is it a problem that can be solved or the sensor has broken?
the compass does not work, after several attempts to recalibrate the various sensors I gave up.

right now I tried to hit the phone on the left side and the screen rotation is back to work, I can not explain all this.

Mmmmmmm maybe your device got a faulty sensor.
Test your device for a longer time and report back.