I lost a cell phone a few years back, it was the then brand-new, high speed low drag state of the art Sony Ericsson that did everything but cook for you. Insurance covered it, I got another one of the same model, and promptly forgot about it. Almost a year later, my dad shows up on my doorstep with the long-lost phone in his hand. Someone had tracked him down via the call log and gotten the phone to him. So after that, I had a spare.