NPKEY Huawei Codes Calculator is an unlock code calculator application for Huawei phones, available for Android devices. This free-to-use program allows you to unlock your Huawei phone with ease. With this app, you can generate unlock codes for supported models such as Y511, F316, F361, G3621, G3621L, G3622, G5520, and G5521.

It is important to note that an internet connection is required to use this application. Additionally, every code calculation is paid, except for the first code calculation, which is free until May 15th, 2016. Overall, NPKEY Huawei Codes Calculator is a useful tool for those who want to unlock their Huawei phones and enjoy the freedom of using them with any carrier.