Multiple Algorithm Support: It typically supports Old Algo, New Algo, and the more recent V201/V3 codes used by modern Huawei hardware.
Huawei stopped providing bootloader unlock codes in 2018. If you have an older model (pre-2018), you can find official unlock codes from Huawei’s former website. For newer devices, no legal method exists.
The calculator takes your IMEI number, runs it through a specific algorithm (often based on the older FFI algorithm or newer proprietary algorithms), and provides you with the code to remove the carrier restriction.