How to activate a iphone that has been reported lost?

How to activate a iphone that has been reported lost? - 1

Only the original owner can get the phone reactivated on the carrier it was reported lost on. So if you bought such a phone, YOU are not going to be able to activate the phone, unless you can get the original owner to do this for you. And it's not happening without them doing it with proper ID/account information.

No. If it is restored in an attempt to be activated then they would be asked to enter the Apple ID & password, which in case of it being stolen it can't.