Did you follow this gist, wallowing in its awesomeness, only to realize your Visual Voicemail stopped working? You just need to reset your carrier settings file, and you’ll get to keep tethering and get your Visual Voicemail back!
- Connect your iPhone and fire up iTunes. Option-click on the Restore button like you did before.
- Navigate to your-username | Library | iTunes | iPhone Carrier Support
- Click on the file in there to reset your carrier settings.