Can I use any unlocked Cell Phone with a Sim card on boost mobile?

Cell Phones

To swap simcards in any phone, it should not be locked with any particular network. If it is, then you need to unlock it, using the network provider or professional third party unlockers like, Simpleunlocking.com and remove the network restriction. Only GSM phones can be unlocked and after unlocking you can swap with GSM networks only and not with CDMA networks.