Browse and select the downloaded firmware folder (specifically the file containing the partition images or .bin files).

Your settings may have been wiped. Log back in and ensure is set to "Auto" or specifically to "LTE only" if you have good coverage.

: Never power off the device or disconnect it during the update process, as this can cause permanent system failure. Why You Should Keep Firmware Up to Date Regularly updating your ZTE MF920U offers several benefits: MF920U Quick Start Guide - FCC Report

You can manage settings via a standard web browser or the ZTELink mobile app, which offers monitoring for signal strength, data usage, and battery levels. Pros & Cons Pros Cons Unlocked: Works with almost any global carrier. Dated Interface: The web UI design is rudimentary. Band Selection: Manual locking improves rural reliability.

This can occur if the firmware is incompatible or the SIM card is not properly seated. Try: