Secure my device
Which device do you want help with?

Secure my device

Lock the device screen, set and change security lock, and locate device.

  1. To lock the screen, press the Power/Lock key.
    device 3194/1660679.jpg
  2. To unlock, press the Power/Lock key.
    Note: To wake the screen using Knock On, tap the screen twice. To enable this feature in settings, go to Settings > General > Gestures > Knockon
    device 3194/1660680.jpg
  3. Touch and drag the screen in any direction.
    device 3194/1660681.jpg
  4. To enable and use Knock Code, swipe down from the Notifications bar.
    device 3194/1660682.jpg
  5. Tap the Settings icon.
    device 3194/1660683.jpg
  6. Under the Display tab, tap Lock screen.
    device 3194/1660684.jpg
  7. Tap Select screen lock.
    device 3194/1660685.jpg
  8. Tap Knock Code.
    device 3194/1660686.jpg
  9. Follow the on-screen instructions.
    device 3194/1660687.jpg
  10. Tap the code to unlock.
    Note: To learn more about requesting a device unlock for your AT&T mobile device, visit If your device is locked and is requesting a "PUK" code, click here for instructions on how to obtain your PUK or PUK2 code to unlock your SIM card.
    device 3194/1660688.jpg

Did you get the help you needed?

Great! We're so glad we could help.

We're sorry that didn't solve your issue.

Thanks for your feedback!