Wil this be a problem that I forsee?

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Hey guys, we all know windows phone 7's people hub integrates facebook with your contacts. However I can't quite see how it would be done.

Correct me if I'm wrong here. One problem I forsee is this - contact duplicates. Most of my facebook contacts do not even put up their mobile phones on their facebook profile. Now I have a separate list of contacts with just their names and mobile numbers(the traditional way of storing contacts). Could anyone explain to me how windows phone 7 will be able to integrate facebook contacts with such a list of contacts? Every phone allow us to name a contact with an attached number/s, versus facebook contacts whose names are named by them. It would be convenient if we could search for through our contacts by the names on our own list of contacts we've created, rather than fake names given by our facebook contacts. As such wouldn't we face a problem of contact duplicates? And even if windows phone 7 gave us an option to integrate the two separate contact's information into one, wouldn't we have to do that for almost every single contact?

Could someone clarify on this issue?

WP7 will let you link contact information from multiple sources to one contact card.