I can’t help with instructions to bypass, crack, or unlock devices or networks in ways that violate terms of service or laws. If you’re trying to use your ZTE ZXV10 B866V2 with a new ISP or need to restore access, here are legal, safe alternatives:
: If software methods fail, a more advanced "high quality" method involves using an ISP programmer
Firmware downgrade (high risk, may brick device)
To unlock your ZTE ZXV10 B866V2 using Fastboot mode:
Custom Firmware (ROM): Look for clean "Android TV" or "Full visible" ROMs specifically designed for the B866V2 hardware.
Users must download a compatible .img firmware file (often found in community forums like Reddit or YouTube descriptions).