: Using an incorrect keygen or unofficial "fix" firmware can permanently disable your device (brick it).
: The original keygen algorithm produced keys that passed internal validation but failed at the [Point of Failure, e.g., "online activation server check"]. Jazz Fix For Own Keygen
: Most keygens use this "fix" to bypass online verification, allowing you to use a Computer ID to create an offline activation file. Is it a "Good Feature"? : Using an incorrect keygen or unofficial "fix"