I bought a similar model, the BV 9300 Pro, a year ago. Blackview has fantastic hardware (well worth the money), but buyer beware! I wish I knew before buying that Blackview has never and WILL never release security or software updates. You WILL NOT be able to use this as your main phone.
The BV8200 is a new smartphone with a secondary display on the back and two flashlights. Several certifications attest to the device's durability against dust, water or temperature extremes. Two SIM cards and a memory card can be installed at the same time, which is certainly not a given among smartphones of this kind.