Lost contacts after turning off Exchange On my iPhone, I gave it to another person who used it and added contacts.  Later I turned off the calendar, contacts, ets. (he didn't have the password) but some of his contacts disappeared.  Can I recover them?
When you delete Exchange account, sync deletes all of the contacts that are stored trough it. You can try to set up Exchange again to get that contacts synced on the phone (you said there is no password assigned) and then use this guide to keep them stored after turning off the Exchange account http://iphone-contacts.blogspot.com/2013/03/keep-your-exchange-contacts-on-your.html