: Common on 4G devices released around 2013-2014. While more complex, developers have successfully reverse-engineered this algorithm, allowing for offline calculators often found on GitHub.
Older algorithms used for early 3G modems and dongles. huawei unlock code calculator v3 v4 offline new algo
From around 2012–2018, Huawei allowed official bootloader unlocking via an (16-digit numeric code). You’d request it from Huawei using your device’s IMEI and serial number. The code was derived via a proprietary algorithm unique to Huawei. : Common on 4G devices released around 2013-2014