The MC7010 is unique because it is often supplied by mobile carriers (Telstra, Optus, T-Mobile, etc.) or purchased directly from ZTE. Each variant may have different firmware locks:
Updating firmware fixes specific known issues, such as: Zte Mc7010 Firmware
Sometimes, carrier-locked models do not receive OTA updates, or the automatic update might fail. In this case, you will need to do a manual firmware upgrade. The MC7010 is unique because it is often
For completely dead devices, you need a USB-to-TTL adapter and solder to the UART pins on the PCB. This is for engineers only. Updating firmware fixes specific known issues, such as: