I use an iPhone and laptop to check emails through Outlook.  I recently went into my People list to find a contact and noticed I was missing their email address, but it kept their phone number.  I then checked other contacts and found they too had missing information.  All of my text messages on my phone started only being displayed as a phone number instead of being displayed as the contacts name.  When I went to find them on my contacts list in my phone, they were gone!  I merged my Hotmail/outlook contacts with my iphone a long time before this happened.  How can I retrieve my contacts data without having to manually enter it in?!  I don't even have enough contact info to even get in contact with some of the people on my lists because its all deleted!

Any advise, ideas....