How to enable SIM card lock on iPhone

Security is one of the most important aspects of the mobile operating system. Apple’s iOS scores as the most secure mobile operating system, as Apple sets up some restrictions for its OS platform. However, there are some settings you need to change in order to make your iPhone more secure. In this case, locking your iPhone’s SIM card seems to be a perfect way to protect your device from unauthorized access. Basically, locking an iPhone’s SIM card means you add another layer of security and people can’t use your phone to call, text or access your date even if they get into your phone.

In fact, locking a phone’s SIM card is not a new concept. It is a basic security feature that is frequently used for various smartphones and tablets. Once you have enabled the feature, you will have to enter a SIM PIN every time you reboot your device. Otherwise, you cannot make calls, text or use your phone’s data.

In this post, we will show you how to lock your iPhone’s SIM card to enhance your security.

Step 1: To lock your iPhone’s SIM card, launch the Settings app and tap Phone. Then, tap SIM PIN to block access to this feature, and tap SIM PIN to activate it.


Step 2: Your SIM card will come with a PIN number set by your mobile carrier. This PIN number will vary by carrier. To make sure you have you have the correct PIN, contact your carrier or do some googling. Note that your SIM card will be disabled if you fail to enter the correct PIN three times in a row.

Step 3: Once you enter the correct PIN, your SIM PIN will be activated.

Step 4: Change your default PIN to your own PIN by tapping Change PIN.

Step 5: You still need to enter your current PIN number, then enter and confirm your new PIN.


Step 6: Restart your phone. A prompt will appear and note that your SIM card is now locked. If you tap OK, your SIM will be temporarily locked, meaning that if you want to call someone, you will be prompted to unlock your SIM again.

Remember that if you enter the wrong PIN three times, your SIM will be disabled. Make sure you set up a PIN you can remember.

That is simple, you now can add another layer of security to make your phone more secure. From now on, you need to enter another code to access the device besides the lock you see on your screen.

Locking a phone’s SIM card is a useful way to protect your device when it is stolen or lost. Don’t forget to tell us if this method works best for you in the comment below.

Was this article helpful?
About John Smith