How to enable MMS (AT&T) without updating to 3.1 firmware!

by Rohit on September 26, 2009

Many readers have sent me repeated requests asking how to enable MMS without updating to 3.1 Firmware. Most of them are understandably Windows users (since redsn0w isn’t out yet and they don’t want to lose their unlock).

Here is a tutorial for both Windows and MAC users running on iPhone 3.0/3.0.1 firmware to enable MMS (AT&T).

Windows users follow these steps:

1) Download this carrier update file 5.5 (release date-9.25.09):

http://www.mediafire.com/?2moannmnyn0

2) Make sure iTunes is NOT open.

3) Windows 32 bit users:
Go to Start menu. Select Run and type cmd then press enter. Run this command:

“C:\Program Files\iTunes\iTunes.exe” /setPrefInt carrier-testing 1

Windows 64 bit users
Go to Start menu. Select Run and type cmd then press enter. Run this command:

“C:\Program Files (x86)\iTunes\iTunes.exe” /setPrefInt carrier-testing 1

4) Now launch iTunes.

5) Hold the shift key and click on update button under your iPhone in iTunes.

6) Change the file type to iPhone Carrier Configuration files by clicking on the drop down menu and switching to *.ipcc filetype.

7) Now browse to the location where you saved the ATT_US.ipcc file that you downloaded in step 1. Choose it and click open.

8 ) Reboot your iPhone. Congrats you have now setup MMS on your iPhone 3.0 or iPhone 3.0.1 firmware.

MAC users follow these steps:

1) Download this carrier update file 5.5 (release date-9.25.09):

http://www.mediafire.com/?2moannmnyn0

Note: Use firefox if not the file downloads as a zip file

2) Make sure iTunes is NOT open.

3) Open the Terminal Application and run this command:

defaults write com.apple.iTunes carrier-testing -bool TRUE

4) Now launch iTunes.

5. Hold the Option (Alt) key and click on update button under your iPhone in iTunes.

6) Now browse to the location where you saved the ATT_US.ipcc file that you downloaded in step 1. Choose it and click open.

7) Now let your iPhone carry out the carrier update process.

8 ) Reboot your iPhone. Congrats you have now setup MMS on your iPhone 3.0 or iPhone 3.0.1 firmware.

NOTE: If you receive 0xE800003D error: Make sure you delete any carrier theme that you have installed from cydia.

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{ 5 comments… read them below or add one }

Schory September 27, 2009 at 3:45 am

when I type “C:\Program Files\iTunes\iTunes.exe” /setPrefInt carrier-testing 1
it says The filename, directory name, or volume label syntax is incorrect.
now what? :[

Rohit September 27, 2009 at 5:44 am

@Schory If you are on Windows, then please make sure that your itunes is installed in C:\Program Files\iTunes

If not, find out where it’s installed and replace C:\Program Files\iTunes with where ever you have it installed. I hope this made sense to you. Lemme know if there are any probs.

gisrael622 September 27, 2009 at 4:50 pm

ok if you are on 32 bit then use this in cmd,

cd C:\Program Files\iTunes\ hit enter then type

iTunes.exe /setPrefInt carrier-testing 1

For 64 bit type this one for the first (then use the same second set.)

cd C:\Program Files (x86)\iTunes\

Rohit September 28, 2009 at 4:46 am

@gisraeli622 Thanks mate!

hecs February 13, 2010 at 11:36 am

have tried this several times and keep getting mgs saying the iPhone could not be updated and unknown error occurred anyone know what will cause this?

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