Just because I spent so much time looking for this last night and found so many broken carrier data files, I figured I’d keep this around for me.


  • Make a backup of your /Library/iTunes/iTunes Carrier Support/ATT_US.ipcc file.
  • Quit iTunes
  • Open Terminal and type “defaults write com.apple.iTunes carrier-testing -bool TRUE”
  • Open iTunes, select your phone and press “check for updates” while holding down the ‘Alt’ key on your keyboard. You will be prompted to select a file. This is the one that worked for me after numerous other failures. (found in gizmodo’s cache somewhere)
  • After you load the file, make sure you restart the phone

Instructions for Windows are the same, but you’ll have to use the Windows Paths for stuff (C:\Program Files\iTunes\blah blah blah).

Right, and I’m not responsible for you running up a trillion dollar bill with AT&T or if your spine curves or if your teeth yellow or if you drink rat poison because you fell in love with a rough trick named Jim or anything else as a result of you trying to do something to your bejebus phone :-)


  1. John Case says:

    A friend of mine showed me how to setup tethering on my iPhone. On the phone, point the browser to http://help.benm.at. Scroll down the page until you see the “Tethering & Internet Settings” section. Very quick and easy install.

  2. Wyatt says:

    That’s correct. I’m just a little funny about random websites updating my phone’s information without me getting to look at it first. Guess I’m paranoid that way :-)

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