tftp 0x80000000 zte_b866v2_generic.bin nand erase 0x200000 0x1000000 nand write 0x80000000 0x200000 0x1000000 reset
This method allows you to use the device by bypassing the restricted home screen:
This method allows you to use the device by bypassing the restricted home screen: zte zxv10 b866v2 unlock high quality free