I bought a BV 7000pro, a month ago, via Ali Express. Saddly the bands on the phone are not compatible with 3G and LTE in my country and with my phone company, it has only bands 1, 3, 7 and 8 on LTE. I'd really appreciate an update or a patch to activate bands 4 and 17 on LTE and bands 850 and 1900 on GSM.

I tried Engineering mode, but those bands are locked.

The bands are limited by hardware and can not get unlocked.