Instructions to obtain the serial number on Blackview devices

Blackview A90 Blackview A90
Blackview BV6600 Blackview BV6600
Blackview A80s Blackview A80s
Blackview A70 Blackview A70
Blackview A80 Plus Blackview A80 Plus
Blackview A6 Plus Blackview A6 Plus
Blackview A80 Blackview A80
Blackview BV6900 Blackview BV6900
Blackview BV6300 Blackview BV6300
Blackview BV5500 Plus Blackview BV5500 Plus
Blackview BV5100 Blackview BV5100
Blackview BV5100 Pro Blackview BV5100 Pro
Blackview BV4900 Blackview BV4900
Blackview BL6000 Pro Blackview BL6000 Pro
Blackview BV6300 Pro Blackview BV6300 Pro
Blackview BV9600 Blackview BV9600
Blackview BV6100 Blackview BV6100
Blackview BV9500 Plus Blackview BV9500 Plus
Blackview BV5900 Blackview BV5900
Blackview BV9100 Blackview BV9100