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Mobile

iPhone users issued warning to change buried setting which would prevent mobile fraud

Alex Walia
July 24, 2025
3 Min Read


Table Of Content

  • How to enable a PIN for your SIM card
  • If you don’t know your SIM PIN 
  • Why should you do it?  
  • What else can you do to prevent mobile fraud? 

iPhone users have discovered a buried setting that can help combat mobile fraud.

It takes just two minutes to enable it and it could stop fraudsters from receiving any one-time passcodes sent by your bank to confirm your identity.

It will also stop them from using any mobile data or making phone calls.

The simple trick is to make sure your SIM card PIN is enabled in your settings – most people don’t know this as the option is buried deep within your phone.

It takes just two minutes to enable it and it could stop fraudsters from receiving any one-time passcodes sent by your bank to confirm your identity

How to enable a PIN for your SIM card

1. To enable a PIN for your SIM card, go to the settings app on your iPhone.

2. Next, select ‘Mobile Data’. 

3. Now, scroll down and click the buried option of ‘SIM PIN’.

4. Enable SIM PIN by clicking the button to turn it green. 

5. Finally, enter your SIM PIN to lock it – once it’s locked, it will prompt you to enter it before using your SIM card, meaning fraudsters will hit a wall.

If you don’t know your SIM PIN 

If you don’t know your SIM PIN or you’ve never used one, enter the default SIM PIN from your network provider.

However, if you don’t know what the default SIM PIN is, don’t try to guess as you may get locked out permanently and end up needing to get a new SIM card.

Instead, check your network provider’s customer service page or the documents that came with your wireless plan. 

If you still can’t find it, you can contact your network provider directly.

If you aren’t sure what your network provider is, remove your SIM card and check for the network provider’s name or logo.

To enable a PIN for your SIM card, go to the settings app on your iPhone

To enable a PIN for your SIM card, go to the settings app on your iPhone

Next, select 'Mobile Data'

Next, select ‘Mobile Data’

Now, scroll down and click on 'SIM PIN'

Now, scroll down and click on ‘SIM PIN’

Finally, enable SIM PIN by clicking the button to turn it green

Finally, enable SIM PIN by clicking the button to turn it green

Finally, enter your SIM PIN to lock it - once it's locked, it will prompt you to enter it before using your SIM card, meaning fraudsters will hit a wall

Finally, enter your SIM PIN to lock it – once it’s locked, it will prompt you to enter it before using your SIM card, meaning fraudsters will hit a wall

Why should you do it?  

Once you’ve done this, when fraudsters attempt to transfer the sim to another phone, they will hit a wall.

It protects your identity –  no one can access it without knowing the various codes or having the exact pattern of your fingerprint.

It’s a good way of securing your identity, especially from fraudsters who are attempting identity theft.

It stops one time passwords from being sent and stops criminals from using any mobile data or making phone calls.

What else can you do to prevent mobile fraud? 

Another option is to switch to an eSIM instead of a physical SIM, so thieves can’t just pop your SIM into their phone.  

Additionally, you should turn off notifications that show part of a message, which means one time passwords won’t be visible on a locked phone. 

Simply go to iPhone Settings – Notifications – Show Previews (set to ‘Never’). 



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Last Update: July 24, 2025

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