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How To Enable MMS On iPhone 3G And iPhone 3Gs On Firmware 3.1 (AT&T)

Yes, it’s true! AT&T is introducing MMS functionality for its customer on iPhone 3G and iPhone 3GS running on Firmware 3.1. Service will be officially launched on 25th September.

iphone MMSWI (Work Instructions) for enabling MMS functionality on iPhone 3G and iPhone 3Gs running on Firmware 3.1 are given below:


  1. iPhone 3G or iPhone 3Gs with 3.1 firmware
  2. Latest version of iTunes, Click Here to download iTunes 9, if you don’t have it

NOTE: The service is only for AT&T customers.

Enable IPCC updateds in iTunes

After ensuring pre-requisites, we first need to enable IPCC updates in iTunes 9. Follow following steps to do so:

Windows 32 Bit and 64 Bit (Windows 7/XP/Wista)

  1. Close iTunes
  2. Go to Start -> Run, type CMD and hit enter
  3. For 32 Bit windows run this command in command prompt C:\Program Files\iTunes\iTunes.exe” /setPrefInt carrier-testing 1, and for 64 Bit windows run this command: C:\Program Files (x86)\iTunes\iTunes.exe” /setPrefInt carrier-testing 1

Command Prompt For Enabling IPCC In iTunesHint: Select required command mentioned in Step3 above and press CTRL+C to copy it, then right click on command prompt to PASTE


  1. Close iTunes
  2. Open Terminal (Applications > Utilities > Terminal)
  3. Now run this command and hit enter: defaults write carrier-testing -bool TRUE

MAC Terminal For Enabling IPCC In iTunes

Download updated IPCC file and update iPhone with it

After enabling IPCC updates in iTunes, we need to download updated/modified IPCC file and update iPhone with it. Follow these steps to do so:

  1. Download updated .IPCC file (ATT_US.ipcc). Download link given at the end.
  2. Plug in your iPhone with your computer
  3. Start iTunes
  4. Now press Alt button on keyboard and click the "Update" button, for Windows press Shift button instead of ALT. iTunes will ask for path of IPCC file
  5. Browse to where you saved the IPCC you downloaded
  6. Select this file and click Choose (For MAC), and click Open for Windows
  7. iTunes Select IPCC File

  8. Once the update is complete, reboot your iPhone

Hopefully, you should have MMS functionality enabled on your iPhone now. Enjoy :)

MMS On iPhone 3GS Firmware 3.1

Download updated IPCC file to enable MMS on iPhone

Update : Enable MMS Update on iPhone 3G/3GS Firmware 3.0.1

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    Jadehawk11 years, 11 months ago

    You are missing the [ ” ] on the command posted
    if you entered as you gave it to us [Thank you by the way] it does not work for me on a Windows 7 32 bit machine [C:\Program Files\iTunes\iTunes.exe” /setPrefInt carrier-testing 1]……

    So I Added the missing [ ” ] to get this [“C:\Program Files\iTunes\iTunes.exe” /setPrefInt carrier-testing 1] and now I was able to select .IPCC files to load to the Iphone 3gs [ using Itunes 9.0.1 ]

    Thank you….

    valerie12 years ago

    It’s enabled, but the message send fails. Guess they will flip the switch on Friday…