|There are times when you might want to lock your iPhone. This will prevent you from dialing a number when the phone is in your shirt pocket or bag. Apple makes locking your iPhone easy.
If you ar in no hurry you don’t need to do anything to lock the iPhone; the iphone will do it automatically, as long as you don’t bump the screen for at least a minute.
If you are in a hurry you can lock the iPhone immediately by pressing the Sleep/Wake button. To unlock it, press the Sleep/Wake button again. As an alternative, press the Home button on the front of the screen, and then drag the on-screen slider to the right with your finger.