iPhone activation
How to activate apple iPhone that is lock and cannot reach the previous owner
iPad, iOS 10
How to activate apple iPhone that is lock and cannot reach the previous owner
iPad, iOS 10
You have encountered Activation Lock a theft prevention feature. Without the Apple ID and password of the original owner, you will never be able to use the device. If you have no way to contact that person, you can recycle the device at any Apple Store.
Check this link...
The All Too Common SAD Reality of Buying … - Apple Community
After erasing a phone how can you retrieve the documents
You can't.
That's what 'erasing' something does...
iPhone activation