Set Up MobileMe

• 1). Tap "Settings" on your iPhone's home screen. Then tap "Mail, Contacts, Calendars."
  
  
• 2). Tap "Add Account."
  
  
• 3). Tap "MobileMe" and enter your Apple ID and password. Verify your email address if you are prompted to do so.
  
  
• 4). Return to the MobileMe screen. Toggle the "Find My iPhone" switch to "On." Tap "Allow" in the dialog box that appears.
  
  

Use Find My iPhone

• 1). Go to Me.com and sign into your MobileMe account.
  
  
• 2). Click the cloud icon in the upper-left corner of the screen. A menu of icons appears. Click the "Find My iPhone" icon on the far right. Enter your password again.
  
  
• 3). View the map to track your iPhone, which is indicated by the glowing blue dot. You can also use this page to lock, wipe or display a message on your iPhone in the event it is lost or stolen.