I recently sold my iPhone X and went back to an 8 Plus. I bought the latter from an Apple store as a "new" iPhone. While I was setting it up, I proceeded to restore from my iPhone X back up BUT then things got weird - several (unknown) apple IDs kept popping up requiring me to enter the password to those email addresses. That made me think if my iPhone is refurbished. I also noticed that the back panel doesn't have the regulatory markings, just plain "iPhone". Any thoughts?