iOS is updated frequently. Apple constantly patches vulnerabilities that unlocking software exploits to bypass security protocols. A legitimate registration code grants you access to software updates. If you use a cracked version, the code may work for one iOS version but fail immediately when Apple releases a patch, leaving you with a locked phone and no support.
Be cautious of websites offering "free" or "leaked" registration codes. These often: or viruses that can harm your computer. invalid keys registration code for aiseesoft iphone unlocker hot