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How to Secure iPhone Against SIM Swap Attacks 

Issue Description 

Scammers hijack phone numbers to intercept OTPs. 

Common Scam Signs 

Sudden loss of network 

OTP messages stop arriving 

Unauthorized account logins 

Step-by-Step Protection 

Step 1: Set SIM PIN 

Settings → Cellular → SIM PIN 

Enable and set PIN 

 

Step 2: Secure Carrier Account 

Add PIN/password with carrier 

 

Step 3: Enable Apple ID Two-Factor Authentication 

Prevents account takeover 

 

Step 4: Monitor Carrier Alerts 

Act immediately if signal drops unexpectedly 

Explore Further 

Contact carrier if SIM swap suspected 

Prevention & Best Practices 

Never share carrier details.