One of the surprising additions to iOS 4.2 is the inclusion of where is my iPhone/Ipad/Ipod. This was previously only available through the paid for Mobile Me service. Essentially this enables the owner of the device to track the location as long as the GPS and handset are switched on. It also allows you to erase all the private information from the device and display a message to the holder of the missing device. Although this may help you track your handset if it’s been left in the office or your car. Once the handset is switched off it renders the software useless. (As apple found out when one of their employee’s misplaced his pre-release iPhone 4).
The update should be available at any point soon so keep an eye on your itunes for an update.
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