Old iPhone 4S won't accept my Apple ID when trying to reset it for a trade-in. Why? I recently deactivated my old iPhone 4S after buying a new phone. I want to trade it in, so I'm trying to reset it, but it won't accept my Apple ID.

Is it because it's been deactivated? How can I wipe it?
Sign into wifi and then try again! Had this problem for forever and the idea of turning on my wifi to verify my apple ID popped into my head and it worked! Best of luck.