Are there good deals on cell phones in NYC/Chinatown?

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Hey, me and my friends are going to NYC this weekend. I really need a new cell phone (I'm using one of those OLD nokia 82x0 series since my NEC broke). I've heard of people getting pretty good deals there, are there any specific shops to check out? BTW I am still on a contract for another 3-4 months so would that mean I can't get any deals? Thanks