I can't send or receive picture messages on my S6 HELP ! Plz

[Shad c]

Everytime I try to sent a picture message from my S6 (Sprint), On my stock messaging app. I press send and picture just disappears and never sends. And when I tried to receive message l, it says downloading but never does very up happy with this rn.

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[PapaGary]

Up happy?

Chances are it is a problem with your APN setting. See:

What is an APN, and how do I change it? | Android Central