Daily Tip: How to set up a PIN code on your iPhone SIM

Curious how to set up a PIN code on your iPhone's SIM card to prevent things like the recent issue with iMessage not de-activating on stolen iPhones? If you're concerned about security, it's probably something you want to do sooner rather than later.

  1. Launch the Settings app
  2. Scroll down and tap on Phone settings
  3. Scroll down to the very bottom and tap SIM PIN
  4. Switch the SIM PIN option to 'ON'Change SIM PIN step 4
  5. Enter the default PIN set by your carrier (AT&T is 1111, if you're on a different carrier check with them, or Google it) Change SIM PIN step 5
  6. Now, tap Change PIN.
  7. Enter the current (default) SIM PIN again
  8. Enter your own unique 4-digit PIN code Change SIM PIN step 6

That's it! Now, if your iPhone gets lost or stolen, your SIM card will remain safe and secure and the new "owner" will have zero ability to send or receive iMessages, or do anything else nefarious with your number.

NOTE: If your iPhone does get lost or stolen, PIN code lock or not, call your carrier immediately to report it stolen and get it deactivated. The PIN code is the temporary solution. The carrier raining down deactivation on their pilfering heads is the permanent one.

Daily Tips range from beginner-level 101 to advanced-level ninjary. If you already know this tip, keep the link handy as a quick way to help a friend. If you have a tip of your own you’d like to suggest, add them to the comments or send them in to dailytips@tipb.com.

Andrew Wray

Andrew Wray is a Salt Lake City, Utah based writer who focuses on news, how-tos, and jailbreak. Andrew also enjoys running, spending time with his daughter, and jamming out on his guitar. He works in a management position for Unisys Technical Services, a subsidiary of Unisys Corporation.

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Daily Tip: How to set up a PIN code on your iPhone SIM

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In fact, all the seems disabled is SMS/MMS and phone calls. iMessages still go through just fine. Am I doing something wrong? I followed the guide to the letter.

According to Apple's documentation if you set the SIM PIN the device (iPhone or iPad) will ask for the PIN anytime the device is reset but only when it's reset. To test this it looks like you'll need to reset your device. It should ask for the PIN then.

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