This update the popular iPhone 3G upgrades to a faster processor and ... and adds a compass and voice control. The design and features are otherwise similar, including GPS, large multi-touch ...

This update to the original iPhone adds 3G data, GPS, and a new shape on the back side. An updated OS supports third-party software, plus corporate email, sync, and VPN features. Other features ...

Sharing battery power on an iPhone generally refers to transferring or sharing charging capacity between devices.