Tom Kirkman wrote:
Hard to find out about something you're not looking for or know exists.
I emailed several of my buddies this afternoon who own iPhones and told them to look into this app. Not a single one of them (5 of them) knew it existed.
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Find my iphone is covered in the manual. Had you looked through it, you would know about it.
http://manuals.info.apple.com/enUS/iphone_userguide.pdf
"A MobileMe Free Account lets you use Find My iPhone (not available in all countries or regions), a feature that helps you locate and protect the information on your iPhone if it’s lost or stolen. See “Security Features” on page 50>."
"Find My iPhone
Find My iPhone helps you locate and secure your iPhone using the free Find My iPhone app on another iPhone, iPad, or iPod touch, or using a Mac or PC with a web browser. Find My iPhone includes: Â Locate on a map: View the approximate location of your iPhone on a full-screen map
 Display a Message or Play a Sound: Lets you compose a message that will appear on your iPhone screen, or play a sound at full volume for two minutes, even if the Ring/Silent switch is set to silent
 Remote Passcode Lock: Lets you remotely lock your iPhone and create a 4-digit passcode, if you haven’t set one previously
 Remote Wipe: Lets you protect your privacy by erasing all media and data on iPhone, restoring it to factory settings
Use Find My iPhone: You need to turn on Find My iPhone on iPhone before you can use these features. See “Setting Up MobileMe Accounts” on page 26.
To locate your missing iPhone and use the other Find My iPhone features, download the free Find My iPhone app from the App Store on another iOS device, or sign in to me.com in a web browser on a Mac or PC."