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Just an update on my situation (Houston, Texas, 3GS with 3.1 and 5.1): It works now. 😀
It's a little slow, but I've been able to both send and receive.
I don't remember everything I did, but I know I restarted my phone multiple times, reset all network settings, and messed with the stuff under Settings > General > Network > Cellular Data Network (but it's at default again, I'm pretty sure). It wasn't working this morning, but I tried around 1:30 and it's been working ever since. 🙂
 
Are the only ones who got it to work actually using a non-jailbroken phone?
My 3GS is not jailbroken.
Just using the 5.1 file.

It seems AT&T is performing a rolling deployment of MMS to each region/tower or whatever.
The "flip of the switch" would be the carrier file I would assume.
This would explain a lot if it is in fact the case.
 
Yes, and name it IPCC.

I have all the options now, just can't send a damn pic still. Sucks.

yeah i figured it out. tired sending a pic but it doesnt work. its weird cause someone on here said that lake charles, la and new orleans, la worked. im in lafayette, la which is dead in the middle of the two and still doesnt work.
 
From what I am reading it's because they have family messaging enabled, which from what I can see would raise my account 10 bucks.

I'll just wait till Sept. 25th
 
I the family messaging plan, and it doesn't work for me at all. Sending to an iPhone or non-iPhone. Based in the IE in Ca.
 
Orange County - AT&T is out with their trucks working on things so that could be why its not working / could be working soon.
 
Upstate South Carolina here. Updated to 3.1, and then loaded the carrier file. MMS working! I turned on airplane mode, opened messages, no icon, turned off airplane mode, and went back to messages, BOOM, icon up! I also have a regular texting plan and not the iPhone texting plan..
 
Not working for me. I rebooted, reset internet settings, nothing. I got the picture icon but they will not send.
 
Still not working for me in the OC. Ill leave the carrier file on and try it periodically.

5.1 IPCC, OS 3.0, ive rebooted, reset settings then rebooted, and entered the username and pass in settings and rebooted and no luck. Don't have the family text plan. Cant send to myself or receive from others. Interesting...
 
Everyone try their Tethering capabilities. Whether MMS works or not. I would like to see if there is a trend.
 
I'd love to if I knew how. Perhaps a quick run-through of the necessary steps.

Just enable Tethering on your iPhone and hook up to your computer either thru BlueTooth or USB.

If you can connect, you are good, (try loading MR or Gizmodo). If you can't then tethering doesn't work for you yet.
 
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