One of the main features of iPhone 3G OS 3.0 is the Internet tethering feature, which basically lets you use the iPhone as a broadband modem over USB or bluetooth.  Smartphones like Blackberry comes with this feature as a standard but I guess Apple still hasn’t figured out how to monetize from it, so they have disabled the function in the official release but some hackers have found how to re-enable it. It’s a great way to use your iPhone 3G as a broadband modem although I doubt it will be fast enough as iPhone is very slow running on itself. Step 1: Check if you own a 3G iPhone. If you’re on EDGE (as I am): sorry. Tethering does not seem to work with EDGE phones. Step 2: Check to see if AT&T is your carrier. If it is: sorry. AT&T will not let you tether. Step 3: Navigate to ~/Library/iTunes/iPhone Carrier Support. Notice the spaces in that last folder name! If you’re at the command line, use backslashes to escape the spaces, i.e. cd ~/Library/iTunes/iPhone Carrier Support. You will find a file with an ipcc extension. Copy that file: e.g. cp foo.ipcc foo.ipcc.original. This creates a backup for … Continue reading iPhone 3G OS 3.0 Hack – How to Use iPhone 3G as a Broadband Modem over USB or Bluetooth!