OTA updates are usually differential (small patches), not full images. If your system files are corrupted, OTA will fail. For a true full update, you must use Method 2.
: If using the web interface, it is safer to connect your computer via the LAN port or USB-C rather than Wi-Fi to ensure a stable connection . Version Tracking zte mu5001 firmware update full
Re-enter any custom APNs; re-pair with ZTE Link app if used. OTA updates are usually differential (small patches), not