Whenever your iPhone passcode is entered incorrectly too many times, a message eventually pops up that says “iPhone is disabled.” This prevents the device from being used for a temporary period of time and is intended to deter people who try to gain unauthorized access to your device and personal information.
On the other hand, the stock message is pretty bland, and a new free jailbreak tweak called GoAway by iOS developer gilshahar7 paves the way to new ways of customization by letting you change the message and other information that gets displayed after too many wrong passcode attempts.