AT&T blocked MMS on the iPhone when firmware 3.0 was available from Apple. Firmware 3.0 has always supported MMS, that’s why when we had the 3.0 Beta we have screenshots showing how MMS worked, but the messages would never go through because AT&T had it blocked by entering an “opt-out” code. Not to mention many other carriers through out the world started supporting MMS when 3.0 was released when AT&T did not.

AT&T has recently announced that they would finally be releasing MMS to the iPhone on Sept 25th, 2009. How will they do this? First, AT&T needs to remove all the opt-out codes they added to accounts to block MMS when 3.0 was released. This is rumored to be part of the reason of the delay in MMS, but it’s also because the iPhone is a heavy bandwidth device and AT&T needed time to upgrade it’s network to handle the addition of MMS. Next Apple will push a carrier update from AT&T to iTunes. This is not a normal firmware update. Once you update, you will see the little camera in your text messaging and will be able to send pictures along with video, contacts and map locations.

Now the question is, how are people getting this early? Simple, they are getting the code early, running iTunes is a mode designed more for Apple engineers than the average user, and uploading it to their iPhone. But, that’s not all that it takes. AT&T still has to remove the opt-out code on your account. That’s why some people can run the hack and still not have MMS. There is nothing you can do but wait for AT&T to get to your account and remove the code. If you want to know how to get the code early and update your iPhone’s carrier file, check out this article I recently wrote about it.

So, for all of you who’ve been writing about “AT&T Releasing iPhone MMS Early”, please get your facts straight. Why? Because you’re giving everyone false hope that some how their iPhone is going to automatically get MMS between now and September 25th without them doing anything. It’s just not true. It’s a hack. Even in a recent interview with AT&T spokesman Mark Siegel by USA Today, he said, “Sept. 25th is still the date…” “We can’t comment on what people might be doing” to get MMS in the meantime.

And, for those of you who are waiting for September 25th, you are going to have to connect to iTunes to update the carrier file on that day. It won’t just start working on it’s own. If you have any questions about this, please ask them in the comments and I will try to clear things up. And if I’m wrong about any of this, please let me know and we’ll make sure everyone gets the right info.

If you want to revert back to the carrier file 4.0 (no MMS) you may download here.

Ok, I’m super excited that I got this to work. I really think it has to with AT&T allowing it to work by removing the opt-out codes (the code AT&T put in to block MMS when firmware 3.0 came out). That’s why I think it took a few days for mine to work after doing what I’m about to show you. It’s really really easy. I’m running an iPhone 3GS, jailbroken, not unlocked, on firmware 3.0.1. Your iPhone does not need to be jailbroken for this to work and I have linked to the file needed for firmware 3.1. Here’s how I did it:

PC/Windows Instructions

1. Download this carrier update file (v5.0) if you are running iPhone firmware 3.0 or 3.0.1 (it might work with lower firmware but I haven’t confirmed it.) If you are on the new 3.1, download here (v5.1).
2. Close iTunes.
3. Click Start > Run > type:cmd then press enter. Run this command: “C:\Program Files\iTunes\iTunes.exe” /setPrefInt carrier-testing 1


4. Open iTunes.
5. Hold the shift key while clicking update under your iPhone in iTunes.
6. Change the file type to “iPhone Carrier Configuration files” by clicking in the the bottom right corner and switching to *.ipcc.

7. Find the file of the carrier update you just saved to your computer in step 1, select it and click open.

8. You iPhone is now updated. You may have MMS right away if AT&T has removed your opt-out code but mine took a few days.
9. To allow for Visual Voicemail to work on firmware 3.0 & 3.0.1 using carrier file v5.0, go to your Settings app > General > Network > Cellular Data Network > and under Visual Voicemail change wap.cingular to acds.voicemail

10. Double check your MMS settings below the Visual Voicemail settings above to match this (do not enter anything in blank fields):
APN: wap.cingular
Username:
Password:
MMSC: mmsc.cingular.com
MMS Proxy: 066.209.011.32
MMS Max Message Size: 614400
MMS UA Prof URL:

NOTE: If you are on EDGE it will take a while for the image to send. If AT&T hasn’t removed the opt-out code on your account yet, you will get a red exclamation point next to the message.

Mac/OS X Instructions

1. Download this carrier update file if you are running iPhone firmware 3.0 or 3.0.1 (it might work with lower firmware but I haven’t confirmed it.) If you are on the new 3.1, download here.
2. Close iTunes.
3. Open the Terminal Application and run this command: defaults write com.apple.iTunes carrier-testing -bool TRUE

4. Open iTunes
5. Hold the alt key while clicking update under your iPhone in iTunes.
6. Find your file of the carrier update you downloaded and select it.
7. Wait for the update. Once it’s done, turn off your iPhone and turn it back on.
8. You iPhone is now updated. You may have MMS right away if AT&T has removed your opt-out code but mine took a few days.
9. To allow for Visual Voicemail to work on firmware 3.0 & 3.0.1 using carrier file v5.0, go to your Settings app > General > Network > Cellular Data Network > and under Visual Voicemail change wap.cingular to acds.voicemail

10. Double check your MMS settings below the Visual Voicemail settings above to match this (do not enter anything in blank fields):
APN: wap.cingular
Username:
Password:
MMSC: mmsc.cingular.com
MMS Proxy: 066.209.011.32
MMS Max Message Size: 614400
MMS UA Prof URL:

NOTE: If you are on EDGE it will take a while for the image to send. If AT&T hasn’t removed the opt-out code on your account yet, you will get a red exclamation point next to the message.

ScreenShots

zachdrago’s instructions:

1) choose the picture you want to send, and hit “email photo.” 2) in the “to:” field type the person’s cell phone number followed by @mms.att.net. now send, it’s that simple. EX: 5552345678@mms.att.net

I’ll get a list started and as you let me know in the comments, I’ll add it to the list. Thanks zachdrago! Here’s the ones I know:

AT&T: @mms.att.net
Verizon: @vzwpix.com
T-Mobile: @tmomail.com & @tmomail.net
Sprint: @messaging.sprintpcs.com
Cingular: @mms.mycingular.com
Alltel: @message.alltel.com
Boost Mobile: @myboostmobile.com
Einstein PCS: @einsteinmms.com
US Cellular: @mms.uscc.net
Virgin Mobile: @vmobl.com

owen gives a tip in the comments below: an easier way. If in north America send to recipient@teleflip.com (5552345788@teleflip.com) teleflip will forward to correct carrier.

Thanks owen!