Hey guys; this happened to me a few weeks ago; but I cant find the setting that fixed this. I have an iPhone 4S and my contacts come from my exchange account over the air. When I receive a call or a text it just displays the number; however those numbers are all stored in my exchange contacts. I found a setting before; after looking for a few hours but cant find it now that said something like conacts use phone or exchange. I need to change it to exchange so the contacts numbers sync back with their names. Thanks!