If the device becomes unresponsive, use the physical Reset button (a small pinhole usually near the SIM slot) to restore factory defaults.
: Disable your antivirus temporarily, as many firmware flashing tools are flagged as "unknown software." : Launch the ZTE MF927u Unlock/Update Tool Zte Mf927u Unlock Tool -UPD-
Most updated ("-UPD-") unlock tools for this model provide the following functionality: If the device becomes unresponsive, use the physical
Run the (e.g., universal flasher or 1-click upgrade tool) as an administrator. If the device becomes unresponsive