If you try to insert a different SIM card—perhaps for cheaper data rates or while traveling—the dongle either rejects the connection or prompts an intimidating "Enter NCK Code" or "SIM Lock" message.
Now go enjoy unrestricted connectivity. Have a question about your Huawei E173u-1 unlock firmware? Leave a comment below or join the discussion on our GSM forum. Huawei E173u-1 Unlock Firmware
Extend the dongle’s life by using an external antenna (CRC9 connector). The unlock firmware fully supports antenna diversity – another feature carriers often disabled. If you try to insert a different SIM