Updated x2: Get tethering and MMS on your iPhone OS 3.0 without jailbreaking – iPhone 3G and 3Gs

Release notes:

• US/ATT only
• Mac or PC
• Your mileage may vary.  We’ve had reports of MMS working for some but not for others.  It appears to be a carrier-based thing.  It also might depend on whether the person who you’re sending the MMS to has an MMS-capable phone.  If it works for you, please let us know.
• It worked for me and it didn’t work for Lizette.
• Please read the below instructions carefully to make sure that it works as intended
• Thanks to our very own Ben Jarman for making this file

Instructions:

1. Download the ATT_US.ipcc file
2. Mac users: open Terminal – located by default in Applications -> Utilities -> Terminal – and paste this code into it:
   defaults write com.apple.iTunes carrier-testing -bool TRUE
   Hit enter
   Windows Users: open Command Prompt – Start/Windows Logo -> Accessories -> Command Prompt – and type in:
   cd c:\Program Files\iTunes
   This will change your working path to C:\Program Files\iTunes (where iTunes is installed by default).  Then type in:
   iTunes.exe /setPrefInt carrier-testing 1
   Type exit and close out of the Command Prompt
3. Change the extension to .zip.  Then change it back to .ipcc.  If you’re on a Mac, it pays off to go to the “Get Info” context menu (accessed by right clicking the file) and change this from there.
4. Plug in iPhone.  You can let it sync or not – your choice.
5. In iTunes, hold down the “Alt” key (Windows), “Option” key (Mac) and click on the “Check for Update” button.
6. Select the .ipcc file and let it do its thing.
7. Enjoy the tethering and MMS!

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