whistle phone finder

Where is my phone ? Have you lost your phone at home and you lose a lot of time to find it, you joke with your friends and they hide your mobile !!! They stole your cell phone and you do not know among the strangers who stole it?
Now, thanks to the application "where is my phone" you just have to run your application, with a whistle or clap, your phone fits more than 60 meters. .