Can i flash my sprint blackberry to boostmobile?

i want to buy a purple blackberry curve 8530 off ebay but im currently with boost.i would like to stay with boost but at the same time have a decent from.can i flash the blackberry?would i have to take it to boostmobile and let them do it??orrrr?thnxxxxxx.|||You do not need to flash a Sprint Blackberry to Boost because it's already on the network, you just need to find a rep willing to activate it. Virgin is prohibited by there agreement with Sprint from activating a Sprint phone.