Unless there was an edit, the GP says the phone was unlocked. I'm guessing the recent iOS changes about not allowing Find My disabled when it is away from known locations was made specifically for this situation.
Find My always requires the Apple ID and password. Almost every recent phone I’ve owned has been traded in at the end and I have to put my password in to disable Find My.
Apple also requires it if you need them to work on your phone/computer at the store. I did it last month.
Apple also requires it if you need them to work on your phone/computer at the store. I did it last month.