Enabling and setting SIM PIN

[EGI5PiLexITy]

I couldn't find a clear answer, so thought I'd try here. I want to protect against port-out attacks and similar security issues by having a SIM PIN. When I was overseas, the SIM PIN where I was came automatically activated and you had to enter it anytime you rebooted your phone. If I read correctly, Public Mobile SIMs come with a default SIM (1234). How would I enable the SIM PIN and then change it? Thanks!

[EGI5PiLexITy]

Thanks! That turned to be easy. I have an iPhone. On an iPhone:

(1) Go to Settings > Cellular > SIM PIN

(2) Turn SIM PIN to "On"

(3) When prompted, enter the Public Mobile default SIM PIN (1234)

(4) Select "Change PIN"

(5) Provide your own four-digit PIN

The iPhone advises you have three attempts at a correct PIN before the SIM is locked.

I've set mine successfully now. Thanks again muchly.

[computergeek541 · Accepted solution]

The method for enabling your SIM PIN varries greatky depending on your device's software. On my phone, it's under Biometrics and Security, Other Security Srttings, Set Up SIM Card Lock.