He pressed [CALCULATE].

To unlock the bootloader, you historically needed a 16-digit "Bootloader Unlock Code." This code was unique to your device's IMEI number.

There are typically two ways to use this tool: running a Python script directly or using a pre-packaged desktop application. Prerequisites

: Enter the IMEI into the calculator. For V5 devices, this will typically produce a 16-digit NCK (Network Control Key). Insert New SIM

When you provide your device’s IMEI, the tool runs that number through a mathematical function that outputs a numeric unlock code. For older Huawei modems, this code is usually long, though some versions produce 16‑digit codes intended for bootloader unlocking.

When these calculators were functional, the process of unlocking a device followed a specific technical workflow:

An unlock code (also known as an NCK Code) is a unique 8-digit number calculated from the device's , a unique identifier for every mobile device . The "v5" designation likely indicates a specific version of the algorithm used by the tool, which may have offered improvements or support for newer device models compared to earlier versions . Beyond network unlocking, some versions could also generate codes to unlock the bootloader —the software that loads the operating system—enabling advanced modifications like flashing custom ROMs (aftermarket firmware) .

Allows a USB dongle, pocket Wi-Fi router, or phone to accept SIM cards from other network providers.

Unlocked devices often command a higher price. Supported Huawei Devices (v5 Algorithms)

The IMEI is usually printed on a sticker under the battery or can be retrieved by dialing *#06# from the device's keypad.