Protecting your SIM card with a PIN

Protecting your SIM card with a PIN

Add another layer of security for by assigning a PIN (personal identification number) to your SIM card.

Important: Make sure you have the default SIM PIN provided by AT&T before continuing.
  1. On the Start screen, tap .
  2. Tap Settings.
  3. Flick left to go to applications, and then tap phone.
  4. Tap the SIM security On/Off switch to turn it on.
  5. Enter the default SIM card PIN, and then tap enter.
  6. To change the SIM card PIN, tap Change SIM PIN, and then enter a new PIN.

Restoring a SIM card that has been locked out

If you enter the wrong PIN more times than the maximum number of attempts allowed, your SIM card will become ​“‍PUK-locked.”

Important: You need a PUK code to restore access to your SIM card. This code may have been provided by AT&T when you received your SIM card.
  1. On the Phone dialer screen, enter the PUK code, and then tap enter.
  2. Enter the new PIN you want to use, and then tap enter.
  3. Enter the new PIN again, and then tap enter.
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