Originally Posted by ajm216
Confirm that your APN setting are correct. I've had that problem when I first got my N4.
OP, keep in mind that the Nexus 5 is supported on T-Mobile and Sprint out of the box, but not AT&T, so you probably need to change the APN settings for MMS to work. AT&T Tech support should be able to give them to you (if you don't want to google it.)