you can send mms messages through sprint blackberry's to other phone the only thing you need is there picture mail email address and it will send it their phone. so when you are sending a picture from your phone to theirs as an email just write their adress in this format
![[email address]](?emailimage=c93bb6b2a1994ef8f87d7cc63cb2732d)
i think thats the correct format...its either sprintpcs or just sprint, if thats not it then tell me and i will get the correct answer......i work at a store