I can't send MMS

[AC Question]

I can't attach any picture or document on my note 4 it's 4G lte note so what can I do help me..

 

[ManiacJoe]

Which phone?
Which version of android?
Which carrier?
Which app?
What is the exact wording of the error message?

 

[B. Diddy]

Welcome to Android Central! MMS requires mobile data (3G/4G) to be on. Is yours on? If it is, then check your APN settings and make sure they're correct for your carrier. What is an APN, and how do I change it? | Android Central