Adding Passcode Protection to Your iPhone

By default, when you wake up your iPhone from Sleep mode or turn it on, you first see the Lock screen. However, anyone who picks up your iPhone can slide a finger along the Slide To Unlock slider and then gain access to your iPhone and all the data, files, and content stored on it.

To prevent unauthorized people from accessing your iPhone, you can activate the Passcode option. This setting requires you to manually enter a secret four-digit numeric passcode (that you create) each time you wake up your iPhone or turn it on and then try to access the Home screen.