The post title you're referencing, "", is a common template used by sites distributing malware, adware, or credential-stealing software . Why you should avoid these "cracks":

: DC-Unlocker does offer free unlocking for specific older modem and phone models. You can check the "Supported Models" list on their site to see if your device can be unlocked without buying credits.

—it is better to pay a few credits for a legitimate unlock than to compromise your entire computer's security.