Misplaced your iPhone? Locate it with “Find My iPhone!”
“Find My iPhone” is a free service for your iPhone 4, iPad and 4th generation iPod Touch. You can locate your mobile device on a map, remotely display a message, lock it, play a sound, set a passcode or wipe your device to erase all your personal data to protect your privacy. For set up instructions, go to http://www.apple.com/iphone/find-my-iphone-setup/.
If you lose your mobile device, sign in to http://me.com from any computer web browser or use the free app on any other iOS device to locate it. If you have an older version of the iPhone, this service is available by signing up for a one-year paid MobileMe subscription. For more information on Find My iPhone, go to http://www.apple.com/iphone/features/find-my-iphone.html.