I need to know why my iPhone says carrier iPhone 54.0
I can’t activate my phone because says the sim is locked and says the Carrier’s is iPhone 54.0
iPhone 12 Pro Max, iOS 16
The Carrier settings version indicates the specific set of cellular settings that are loaded on your iPhone, which is being determined by your Cellular Provider. Unless you are debugging an issue with your cellular connection, you shouldn't really care about that number; it's just a software version.
Now, onto your SIM locked issue. Don't try to guess your SIM PIN. The wrong guess can permanently lock your SIM card, which means that you would need a new SIM card.
- Contact the carrier that gave you the SIM card. If you aren't sure which carrier to call, remove your iPhone SIM card or iPad SIM card and check the card for the carrier's name or logo.
- Ask your carrier to help you unlock your SIM card using the default SIM PIN or PUK code.
- If you can't unlock your SIM card using the SIM PIN or PUK code or if an alert says, "PUK exhausted," ask for a new SIM card.
See Use a SIM PIN for your iPhone or iPad - Apple Support for more information.