Which phone will I get from a T-Mobile exchange?

Hi, my Sidekick 2008 broke yesterday, and they said they're going to order me a new one, which they shipped. Well, they don't sell this one anymore, because the new one came out. They sell it, but not online, or at least I couldn't find any.. So, do you think they'll ship me the newest one, the Sidekick LX 2009, Or will they send me the same one I had?
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