Huawei E173u-1 Unlock Firmware High - Quality

You may have flashed a generic firmware with older radio firmware. Fix: Update the radio firmware separately (search for E173u-1_Radio_Update_11.126.05.00.00 ). Or flash a newer all-in-one unlock package.

He finally found it on a page that looked like it hadn't been updated in a decade. The instructions were written in broken English: "Flash at your own risk. Do not unplug." Huawei E173u-1 Unlock Firmware