[header] How to disable an iphone [title] Tap on " settings " from the home screen of your iphone. [title] Tap " passcode " or " touch id and passcode ". [title] Tap " turn passcode on ". 
[title] Enter any passcode of your choice into the four-digit passcode field displayed on-screen. [title] Enter the same passcode again for verification when prompted to by your iphone.