Sure they will...I just bought a i530 and have gone through an i95 and an i90 that I bought off ebay...but always go forth with a buyer beware atitude...Have you had a chance to visit a Nextel retail store yet? Some of the new phones developed just for Boost are damn good options and they have some great prices on the older models at some of the larger retailers like Wal-mart and Target....i730 @ $149.99, i285 @ $60, i215 @ 39.99!!!
Blaze...check out your options for a new product first before jumping of the bridge with somebody else's parachute!
Jess