Let the progress bar reach 100%. Do not unplug the modem during this process. A success message will appear when finished.
An NCK (Network Control Key) code is a unique number that "unlocks" your modem's SIM card restriction. The modem's dashboard will ask for this code when you insert a SIM from a different carrier. You can generate this code using a calculator program and your IMEI number.
Huawei modems built during this era use a security algorithm based on the IMEI number. You will need a utility to generate a "Flash Code" (Firmware Password) using your modem's 15-digit IMEI. Step 2: Preparing Your PC and Device Huawei E173u-1 Unlock Firmware
Note: You only have 10 attempts to enter this code correctly before the modem locks permanently. Troubleshooting Common Issues Firmware Update Error: "Port Not Found"
The following is a technical overview regarding the concept of "unlock firmware" for this specific device, including the methodology, risks, and the distinction between unlocking and debranding. Let the progress bar reach 100%
: Use a tool like Universal Master Code to generate "Flash" and "Unlock" codes based on the modem's IMEI.
Download the official or generic E173u-1 firmware (e.g., version 11.126.85.00.209 or similar). Run the .exe file as an Administrator. An NCK (Network Control Key) code is a
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.
Carriers use software locks embedded in the modem’s firmware. This prevents the device from registering network signals from competitor SIM cards. What is unlock firmware?
Use a tool like NV Items Data Backup to save your modem's current NVRAM settings. This ensures you can restore your original IMEI and calibration data if anything goes sideways. Step 2: Download the Unlock Firmware and Tools