: Connect the modem directly to the motherboard USB port. Do not use external USB hubs.
Recommendation: Do the free firmware flash. It takes 20 minutes and costs $0.
: Upgraded firmware fixes bugs and improves connection stability. Technical Specifications of Huawei E173u-1
Locate the 15-digit code printed on the sticker under the modem cap. Huawei E173u-1 Unlock Firmware
Before downloading files, it is crucial to understand how Huawei secures these devices.
You need a generic Huawei firmware version that does not carry carrier branding.
: Run a calculator to get both the Unlock Code (for the SIM) and the Flash Code (required for firmware updates). : Connect the modem directly to the motherboard USB port
Remove all SIM cards and close all Huawei mobile partner software.
Run the downloaded firmware updater executable file as an Administrator. Accept the data warning terms.
Extract the downloaded firmware zip archive and run the .exe updater file as an Administrator. It takes 20 minutes and costs $0
Look at the sticker underneath the modem casing. Ensure it explicitly reads E173u-1 . Do not flash E173s-1, E173s-2, or E173u-2 firmware on this device.
Unplug your modem. Install the latest Huawei USB drivers on your Windows PC. Restart your computer to apply the changes. Step 3: Generate the Flash Code
Look on the back of your USB modem (behind the SIM slot) for a 15-digit IMEI number.