How can Apple identify the carrier for a SIM-locked iPhone?

My understand is Apple cannot tell you who an iPhone is carrier locked to. But this link may help you identify the phone is locked to via its IMEI number --> https://imeicheck.com/

This leads me to wonder if you purchased a used iPhone, which is carrier locked? Be advised that ONLY the carrier the phone is locked to can unlock it. And if you are NOT their customer, especially if any money is owed on it's contract, they are under no obligation to unlock it for you.

If you bought a used iPhone from someone, which is risky at best, read this --> The All Too Common SAD Reality of Buying … - Apple Community

Can Apple identify which carrier my iPhone is locked to?

No.

Did you buy a used phone from someone? In that case, even if you knew which carrier the phone was locked to, you would need to contact the carrier to ask them to unlock the phone.

In most cases, the carrier will refuse to do this because the phone has been reported as stolen, or the previous owner ran up a large billl and refused to pay.

If you did buy a used phone, your best bet would be to return it for a refund.

Yes. Click here and contact Apple Support.

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Hello~ You can Open the Settings app>>> Tap General>>>Scroll down to Carrier. There you should be able to see your Carrier.

~Katana-San~