: Before flashing, write down your original IMEI, MAC addresses, and carrier APN settings. You may need them if you ever want to revert to stock firmware for warranty service.
: Flashing firmware from a different region (e.g., trying to put Saudi Arabian firmware on a German T-Mobile unit) can result in a "No Service" error or even hard-brick the device. Troubleshooting Common Issues zte mc801a firmware flash portable
If you still want to proceed, here is the legitimate method. : Before flashing, write down your original IMEI,