As far as I know, there isn't. Building a phone that supports Sprint/Verizon's CDMA networks costs significantly more than with GSM carriers, so no one as far as I know have bothered with a Windows phone, which never reach expectations as it is. You have a few options with other carriers, but I can't think of any phone that would work with Boost Mobile. You might try picking up an unlocked Verzion Lumia 730. That should work, but that phone is quite old now.