How to Lock the Files on an iPhone
- 1). Launch the Settings application on the iPhone by tapping its icon on the home screen.
- 2). Tap the "General" button, followed by the "Passcode Lock" button.
- 3). Tap the "Turn Passcode On" button to activate the passcode lock.
- 4). Enter a four-digit passcode, and then enter it again to confirm the code.
- 5). Press the Power button on the iPhone handset to turn the device off. Whenever you turn the iPhone back on, you will be required to enter the four-digit passcode to unlock the device and its files.
