The tool calculates both an "Unlock Code" (to bypass the network) and a "Flash Code" (used for firmware updates).

Users input the device’s International Mobile Equipment Identity (IMEI) number.

When the device displays "SIM Network Unlock PIN," input the generated v2 code. The Danger of Modern Downloads: Malware and Scams

Third-party unlocking services maintain access to databases linked directly to factory servers. Users provide their IMEI, and the service retrieves the official V3 or V4 unlock code for a fee.

E173, E303, E353, E3131, and early E3272 variants.

“v2 is not final. The calculator learns. Do not run it on a networked machine unless you want it to phone home.”

When you purchase a mobile broadband device (like a "dongle" or pocket Wi-Fi) from a specific network provider, it is usually "locked." This prevents you from inserting a SIM card from a competing network.

No waiting for a remote server; codes are generated offline.

The "V2" (or "New Algo") differs from the original V1 because it incorporates an MD5 hash of the IMEI combined with a specific salt/table. Input: A valid 15-digit IMEI.