When your iPhone is lost or stolen

Have you enabled iCloud's 'Find my iPhone' feature?  If you want any chance of finding the phone if it is lost or stolen, then make sure it is turned on.  

I regularly need to use 'Find my iPhone' when it is 'lost' in my own home - for example, yesterday!  Where was it?  Under some papers on my desk!

What to do when your phone is stolen