I bought a KRZR last night off of Ebay which I thought was a Boost KRZR. But now that I'm looking more thoroughly I see that it says "Sprint" under on the battery...but then in one of the pictures of the screen it says "Boost Mobile"...is this phone going to work with my Boost SIM card? Any help is appreciated! :] Here is the link to the phone: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=310124706067&_trksid=p2759.l1259