How to Find The Lost iPhone
If you somehow lost you iPhone, you will need a MobileMe account. You also have to borrow iPod Touch, iPad or another iPhone from your friend. And Location Secrvices
Location Services feature turned on on your lost iPhone (you can turn it on by click Settings >> General >> Location Services)
1. Install the Find My iPhone application on your friend’s iPhone, an iPod Touch, or an iPad.
3. Sign in with your MobileMe name and password. The application will locates your iPhone and shows you the location on a map.
4. Set a display message or make your iPhone play a sound. The message will show up on your iPhone’s screen, so anyone who find your phone or stole your phone will read it.
5. Lock your phone remotely. This way, other people cannot use your phone without the passcode.
6. Remove your phone of all personal information remotely. This will delete all your personal data on your phone permanently. Use this feature if you do not think you can’t get your phone back.

