If your box is working, dump the firmware via:
Place the valid update.zip file onto the root of a FAT32 USB drive and plug it into the box. Disconnect the power cable from the back of the ZTE box.
Keep holding the button until the Android Recovery screen appears on your TV. zte zxv10 b760hs3 firmware
This indicates a signature verification failure. The firmware file you are attempting to flash does not match the exact hardware revision of your B760HS3, or the bootloader is strictly locked down by the ISP.
What are you trying to fix by flashing the firmware? Share public link If your box is working, dump the firmware
: A notable custom update was released as recently as December 5, 2025 , by EJ Electronics, which includes a refreshed Android security patch level. Key Features of New Firmware :
There are two main methods for updating or installing firmware on your ZTE device: an online update and an offline flash. This indicates a signature verification failure
This requires a male-to-male USB A cable.
adb connect <box-ip> adb reboot recovery # Then select "Apply update from ADB" adb sideload firmware.zip