updated 12:30 am EST, Tue November 29, 2011
Shares 3G data with Macs, PCs
An app that allows unlimited tethering from an iPhone or 3G iPad to a Mac or PC has appeared in the App Store, called iTether and costing $15. The app requires that users download a free matching Mac or Windows application from the developers' website after installing the iOS app, but once this is done users simply connect the iPhone or iPad to the Mac or Windows machine via a USB dock connector cable to share the connection.
Apple has been known to remove similar apps from the App Store, raising the possibility that iTether will also be removed at some point. Carriers such as AT&T do not allow such tethering and have told users who tether that their plans will be involuntarily upgraded to a more expensive option.
The program appears to allow connections to work at the same speeds as the iPhone or iPad can use for 3G data natively. For now, the program is still available from the App Store.