Imagine communicating without an internet connection, SMS, or any sort of data transfer. Pretty wild huh? There is an app called Tin Can which creates a communication net using only a phone’s WiFi radio signal. It uses phones with the app as relays to one another, passing off a message to another nearby phone. The range is limited to 100 feet, however should enough users exist in close proximity (densely populated areas like NYC for example) one message could spread to many phones in a short period of time until it finds the intended receiver . The usage of this app is not universal. Certainly it would be cumbersome for daily use, however in areas where reception is difficult to come by, such as concerts, protests or festivals, this is a perfect fix.