The firmware is hardware- and carrier-specific. Using a wrong link will almost certainly brick the device.
Although the specific MF10 page is no longer directly accessible via some older links, the main ZTE support portal has historically provided manuals and support for legacy devices. The official repository for ZTE device information is located at: zte mf10 upgrade firmware link
Log in using your admin credentials. The factory default is usually admin for both username and password. Step 2: Navigate to the Management Section The firmware is hardware- and carrier-specific
Log into your router dashboard (usually 192.168.0.1 ) and note your current firmware version. zte mf10 upgrade firmware link