Special thanks for fast answering. I bought my bv8000pro ( by the way, my 3rd BV) online via AliExpress (shipped from China to Austria) and so its no easy way to return the cellular (toll/custom/freight).

Finally, once again a special thanks for your answer.

I'm so pissed off about the "restarts". The problem starts after the 2.nd update i made (in my case - the booting- restarts begun after the Updates) and so I've a problem to belive its a hardware-fail. I'll wish a real solution and not only to put off !