Apple's Find My iPhone service is a great tool for finding lost or stolen iPhones. It not only uses the built-in GPS or location services of the device it's running on to locate it on a map, it also allows users to remotely lock or delete all data from their device to prevent a thief from accessing it.
Find My iPhone used to have Apple's Mobile Me subscription service fees attached to it but, with the introduction of iOS 4.2, it's now free to all iPhone 4, 4th generation iPod touch, and iPad users running iOS 4.2
Now that it's free, if you're not already using another service to track a lost or stolen iPhone, all iOS 4.2 users should set up Find My iPhone on their device. Here's how.
Begin by tapping the Settings app on your homescreen (unless you re-arranged your apps, that is. If you did, find the Settings app wherever you put it). Once there, scroll to the "Mail, Contacts, Calendars" option and tap it.
