After flashing, perform a “Factory Reset” from the web interface to clear any residual corrupted NVRAM.

Ensure the "Erase All Flash" option is selected if you are performing a clean install/unbrick. Click (often a green play icon).

Many advanced users prefer the (no Vodafone bloatware). Search for “ZTE MF65 VDF-GB_UN_B02” or similar. This often fixes carrier locks and improves performance.

The "full download" for this device usually comes as a specialized tool pack rather than a standard firmware file. Source Sites