Generic firmware often removes carrier locks. However, if you flash generic firmware and the device still rejects a foreign SIM, the lock is , not firmware-based.
: By default, the modem can notify you of new versions if you are in a "Connected" state. Manual Checks : Users can navigate to Settings > Device settings > Software Update in the WebUI to manually trigger a check. Visual Indicators : During a firmware upgrade, the LED indicator will alternate between green and blue flashing Carrier Delivery zte mf833v firmware
Flashing incorrect firmware can brick your device. Always use carrier-approved or ZTE-official firmware. Generic firmware often removes carrier locks