Does the blackberry, pearl or anyphone that works with sprint and nextel works with BoostMobile as the carrier?

The phones I seen that boostmobile carry look kind of cheap. Does the blackberry, pearl or anyphone that works with sprint and nextel works with BoostMobile as the carrier? Thanks!|||As long as it was a NEXTEL phone it will work with Boost. Sprint network phones can NOT work with Boost.