Carrier & SIM
Carrier lock is a contract between the phone and one carrier. Only that carrier can lift it, and only if you meet its terms. No website, SIM adapter, or software changes that fact.
Carrier unlock: the official route
Check Carrier Lock, meet eligibility, request it.
eSIM transfer and SIM Not Supported
What the message means, and how eSIMs actually move.
iPhone unlock service online, free: what actually happens
Why free online unlock claims are usually resellers or scams.