I have same problem in my second phone, wont calibrate at all.
First phone worked great except had dead strip on rh screen.
First bv6000 had android 6 and calibrated compass quickly but this android 7 bv6000 wont.
I would love some help as if this phone is faulty I will be asking for money back.

I have just bought BV6000 and I cannot type the letter "p" in portrait when there is sufficient room on screen, same space as "q" side and q works?????
I have had this less than a week so not real happy.
Also the GPS app does not initiate??????
Seems good so far otherwise.