This usually indicates a corrupted download or low storage. Factory reset, then use a wired Ethernet connection to the router (not Wi-Fi) when re-attempting the update.
: Open a browser and enter 192.168.0.1 or 192.168.100.1 (check the sticker on the bottom of your unit for the specific default IP). zte mc888 firmware work
: Users can manually check for, download, and install firmware packages. This usually indicates a corrupted download or low storage