The short answer is:
To use a local SIM card while abroad and avoid expensive roaming charges. huawei unlock code calculator v5
The v5 calculator was designed for . For devices like the Huawei P30 (Kirin 980) or Mate 40 (Kirin 9000), the algorithm changed completely. These phones use a rolling, cryptographic hash that cannot be reverse-engineered by a desktop calculator. In fact, for these devices, not even paid services can unlock the bootloader today—only Huawei's internal servers can. The short answer is: To use a local