Plug in the modem. Open Device Manager. Under "Modems," right-click "Huawei Mobile Connect - 3G Modem" > Properties > Details > Hardware Ids.

: Operates on UMTS 2100 MHz and GSM 850/900/1800/1900 MHz bands.

Improvements in connection maintenance, particularly in areas with fluctuating 3G signals.

You will need a Flash Code and Unlock Code (Nck) for your specific IMEI. Phase 1: Preparation (Get Your Codes)

Generic Huawei firmware is hard to find directly. Try these sources: