Why can't i send MMS

[AC Question]

So I have never had this problem before but starting about 3 days ago My samsung galaxy s7 from Sprint will not let me send MMS. I haven't changed anything on my phone that I can remember. I did change my number and it seems that it started after that. That was on Friday morning and I havent been able to send MMS since. So not sure whats happening there. I need help, anyone please! lol

 

[belodion]

Have you spoken to Sprint about it?

 

[Cici2x3]

No but maybe I should. I was able to send them with Wifi before now I can't send mms period.