How To: Enable MMS on iPhone 3G/3GS on 3.0 3.0.1 3.1

Check out this video iPhone tutorial and learn how to enable MMS pciture messaging on your 3G/GS.

Windows XP/Vista 32 Bit Tutorial
Download this file.
Close iTunes and Unplug iPhone.
Go to Start Menu and click RUN.
Then type in CMD and click ok.
After that type in or copy/paste: cd c:\Program Files\iTunes\

After that type or copy/paste: iTunes.exe /setPrefInt carrier-testing 1

Click enter.
Then exit.
Then plug in iPhone and open itunes.
After that hold down shift and then click update.
Something should pop up and then change it from .ipsw to .ipcc.
Then click on the file and let it update!
After that reboot your iPhone

For Windows Vista 64 Bit:
Download this file.
Close iTunes and Unplug iPhone.
Go to Start Menu and click RUN.
Then type in CMD and click ok.
After that type in or copy/paste: cd c:\Program Files (x86)\iTunes\

After that type or copy/paste: iTunes.exe /setPrefInt carrier-testing 1

Click enter.
Then exit.
Then plug in iPhone and open itunes.
After that hold down shift and then click update.
Something should pop up and then change it from .ipsw to .ipcc.
Then click on the file and let it update!
After that reboot your iPhone.