Interrupted update or bad flash. Fix:
This is the primary method for most users. FOTA means the update is delivered directly to your device over the internet. The process is straightforward. Zte Mu5001 Firmware Update
To update the firmware on your ZTE MU5001 5G portable router, you can use the device’s touch screen or the web management interface. Keeping your firmware current ensures better stability, security, and performance on 5G networks. How to Update via the Web Interface Interrupted update or bad flash
A: The MU5002 has a different chipset. Do not use MU5001 firmware on an MU5002 – you will brick it. Zte Mu5001 Firmware Update