One possible scenario that occurs frequently with iPhone users occurs when they use an app called "emoji" to put little emoticons next to people's names. Sync can't recognize the shapes listed in their contacts and for some reason it chooses one at random or maybe the first name listed and calls them. This happens even when you try to call someone with no smiley faces in their name as long as 1 contact has an emoji, the entire contact list downloaded will be corrupted.
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