Cd5152 wrote:
I don’t know what carrier the phone is for.
You do not know the carrier, and Apple does not have that information.
Even if you do have that carrier info, the carrier may well choose to refuse to deal with you, and that refusal for any of various valid reasons.
The sale was also from a seller that has apparently disappeared. This because you’d otherwise be asking the seller for resolution or a refund.
This means you have purchased an expensive brick; that you got scammed.
These sorts of sales can have other blocks as well, including Activation Lock, and a blacklisted IMEI.
The All Too Common SAD Reality of Buying a used iPad/iPhone - Apple Community