Disable The Erase Data Option After 10 Failed Attempts
One additional security measure that you can enable with the passcode is the ability to wipe all of the data on the phone in the event that the passcode is incorrectly entered 10 times. If someone has your iPhone and they should not, then this limit means that they will only get a few tries to bypass the code. But if you often incorrectly enter your code, or if someone else with access to your device has been using this to reset your device, then you may want to disable it....