- Initially, iPhone doesn't require you to enter a passcode to unlock it. You can set a passcode that must be entered each time you turn on or wake up iPhone.
- Set a passcode:
Go to Settings.
- Tap Passcode.
- Set a 4-digit passcode.
Set or change password security
Apple iPhone 4
Set or change password security
Enable or change the password on your device.
INSTRUCTIONS & INFO