How can I find my missing iPhone? Dial it
Can’t find your iPhone? We’ve all been there, it gets misplaced or falls between the couch cushions. But hey, no problem, if you don’t have Find My iPhone enabled (which you should), you can just try dialing it instead to make it ring.
Ok so obviously dialing your phone requires another phone handy, but if you don’t have that then just go to http://www.icantfindmyphone.com/ and enter your phone number. It’ll ring your phone free of charge, so you can track it down. Of course, if you have the iPhone on vibrate it’s going to be a lot harder to find.
When you answer you get an automated message saying “It looks like you found your Phone, have a great day!”
This isn’t quite as powerful as the service offered by Apple through MobileMe that uses the iPhones built-in GPS to track down the device, but hey it’s better than nothing (plus it’s free). If you’re in a bind, try it out.