How to switch a boost mobile iPhone over to Verizon?

How do I switch a boost mobile iPhone over to Verizon?

Added (1). My best friend is sending me her old iPhone 4S for my birthday, but she is on Boost Mobile. I'm on a Verizon family plan. Is there anyway I can switch the phone carrier over to Verizon so I can actually use the phone?

You can get the Boost iPhone 4S flashed to Verizon and that'll make the phone usable on Verizon. If you need help with getting your phone flashed to Verizon, mail me for references.