You plug in the E173, and Windows installs "Serial Port drivers" but never launches the "Mobile Partner" dashboard. This is a classic firmware corruption issue where the virtual CD-ROM partition (Zero-CD) has been wiped. Version .209 includes a robust Zero-CD partition.
⚠️ WARNING: Flashing the wrong firmware can permanently "brick" your E173. Ensure your device is the E173 (not E173s, E173u-1, or E173u-2). Check the sticker under the battery/USB cover. -huawei firmware E173 11.126.85.00.209 B427-
Frankly, no modern smartphone user needs the E173. However, for legacy automotive head units (2012-2015 BMW iDrive, Audi MMI) that only accept specific Huawei modems for "SIM card data," the -huawei firmware E173 11.126.85.00.209 B427- is the final software that properly handles keep-alive pings and automatic reconnection after ignition cycles. You plug in the E173, and Windows installs
Furthermore, security researchers use this specific firmware version to test GSM interception vulnerabilities because it contains the outdated (and now illegal in some regions) AT command AT+CIMI response timing leak. ⚠️ WARNING: Flashing the wrong firmware can permanently