I have an iPhone 3GS and I can't get the mms working. I have unlocked my brothers iPhone for tmobile and I downloaded the mobile config file from help.benm.at/help.php and the cellular network data part shows up on his. My iPhone is on AT&T and I did the same thing on mine and the cellular data part doesn't show up. But the internet tethering does. Has anybody got mms workig on an AT&T iPhone?

MMS for iPhone on AT&T will be supported later this summer. Watch the Keynote on 3.0. They say that in there.

http://www.apple.com/iphone/softwareupdate/

Read the small text under MMS...

MMS for iPhone on AT&T will be supported later this summer. Watch the Keynote on 3.0. They say that in there.

Yeah I know but you can enable it through that website. And I wanted to know if it was just my phone or if I'm doing something wrong

Yea, you can have it enabled but it is not supported so it won't work right now.

Your texting plan with AT&T has to be provisioned for MMS. This means:

-If you made the AT&T account for the iPhone, it wont work yet.
-If you added the texting plan as an iPhone testing plan, it wont work.

-If you had an existing plan with texting and got the iPhone as an upgrade it should work.(ive seen this work)
-If you have an iPhone plan, but texting as part of a family plan, it should work.

That site has the info you need to put in the MMS settings. try it out if your texting plan is one of the ones i said should work.

yea I got the iPhone as an upgrade at the apple store and I have a family unlimited texting plan