E173u-1 Unlock Firmware - Huawei

Utilizing a Network Control Key (NCK) that, when validated against the device's IMEI, instructs the firmware to lift the SIM restriction.

Huawei provides internal service firmware (usually version 11.810.09.00.00 or similar) used by repair centers. This firmware resets the modem to factory defaults, removes carrier customizations, and often re-opens the modem to accept standard flash codes. Huawei E173u-1 Unlock Firmware