Even if a user manually updates the firmware, the device will likely attempt to "phone home" to the ISP's Auto Configuration Server (ACS). The ISP can remotely downgrade the firmware or reset settings to factory defaults, negating local changes.
Navigate to (gear icon) > Device Preferences > About . Select System Update . If an update is available, download and install it. zte zxv10 b866v2 firmware
To help find the exact variant or custom firmware files for your device, could you let me know your device originally came from, and what specific feature (like root access or a clean UI) you are hoping to get out of the update? Share public link Even if a user manually updates the firmware,
Use the remote control to select > Update from udisk . Select your firmware .zip file and press OK. Select System Update