app on Google Play is their mobile tool for generating these codes. Note that most calculations for V4/V5 are paid services Huawei Code Calculator (GitHub)
Motivations and typical use cases
It was a Huawei V4 Algo modem—a sleek, white brick of plastic and circuitry that was currently about as useful as a paperweight. Huawei V4 And V5 Unlock Code Calculator Download