How To: Easily Enable Tethering With iPhone 3.0

How To: Easily Enable Tethering With iPhone 3.0

Gregory Han
Jun 18, 2009

We hope you iPhone users have updated to iPhone 3.0 (it was a sluggish upload yesterday, but we got our unit updated after about 45 minutes), enjoying the much anticipated "cut and paste" and search features. Upon updating, you probably noticed two notable features missing thanks to the wonders that is known as AT&T: 1) MMS and 2) tethering, the ability to use your iPhone's 3G connection to access the internet on your laptop via Bluetooth or USB. Well, the folks over at 9to5Mac noted that you could indeed enable tethering in pretty simple fashion, allowing mobile access while at home or away from a Wi-fi connection using your iPhone. We've posted their instructions with the addition of some how-to images to make this process even easier below...

1) Make sure you're on an updated OS 3.0, 3G iPhone with iTunes updated to 8.2. This will not work for the 1st gen iPhone. Then go to your Applications folder, Utilities and then launch Terminal and copy, paste and enter the following command:

defaults write carrier-testing -bool TRUE

2) Download this IPCC file (for AT&T subscribers) and mount the disk image onto your desktop (via Gizmodo); for other carriers, try here.

3) Option-click on "Restore" in iTunes with your iPhone attached. Browse to the opened disk image IPCC file and hit "OK". Your iPhone settings will update for a few seconds. [Note, if the selection is grayed out, you've likely skipped entering the Terminal command. Close iTunes, enter command, then start from step #2]

4) At this point, tethering option on your iPhone should be enabled. Activate by opening your iPhone Settings > General > Network > Internet Tethering and turn to "On". Now you can access the internet on your laptop using either Bluetooth or a USB connection! Just note that this will drain your iPhone battery pretty quickly, but it's a nice backup option when you need an internet connection while on the go or when your access is down at home (which is often with our provider). Enjoy!

*Note: some users are noting activating tethering is disabling Visual Voicemail. To restore Visual Voicemail, do the following:

  • Go to Setting > General > Network > Cellular Data Network
  • Under visual voicemail in the APN block, input: acds.voicemail
  • Reboot iPhone

Unfortunately you will lose tethering capabilities once restarted (strangely this is not an issue for all users activating tethering, with some reporting having both features intact upon tether enabling).

*Also be sure to check out the list of 96+ secret 3.0 features uncovered by iPhone users over at

Thanks to 9to5Mac and Sean Bonner.

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