Hi there! Never done this before, but the issue is driving me nuts....
First off, turning the cellular data on does NOT eliminate the problem. This is my 2nd day with the phone and issues started the night it was activated (last).
I made sure ALL the settings were correct (cellular data,mms settings, etc) and finally had to call Tech Support. They were useless. The first rep reset stuff and had me send a pic to myself- it went through so she said everything was resolved. It wasn't. After we hung up I tried to send the mms to the original recipient but it didn't go through so I tried resending AND sending to other people, in case it was an issue with the other persons phone. Still didn't work.
Called again and this lady was a COMPLETE moron...... She says "oh we'll it's not the phone, it's not the network-it's EVERYONE else's phone. (All six of them). She says that there is nothing that can be done. That's it.
Sooooooo......... I'm just supposed to have a phone that doesn't send MMS to people? A $400 phone, at that?????
There HAS to be a resolution. Side note: I AM able to send mms to other IPHONE users, NOT other AT&T users and NOT to any other carrier