I have a 5C IPhone. I can't send out pics while having a conversation. Why?

[iMore Question]

I can receive pics but not send out.

 

[SwitchBeach]

"While having a conversation" meaning ... Talking on the phone? FaceTime? Using iMessage? Something else?

"Send out pics" how? Email? MMS? iMessage? Something else?

What carrier are you using?