All of my contacts on my iphone have disappeared?

A few days ago i synced my iphone to my computer and i just noticed today that my whole contact list has been wiped out.however, all the names of people are still in my messages but it one let me save them to my contacts. I never activated my icloud account until today but i still have a blank contact list.

Sounds like something went wrong during the syncing process, you might have to do a restore on your iphone

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