Allows smart-phones to communicate, even in the face of catastrophic failure of cellular networks. It works by using your phone's Wi-Fi to communicate with other phones on the same network. Or even by forming impromptu networks consisting only of mobile phones. This software allows you to easily make private phone calls, send secure text messages and share files in caves, in subways, in the Outback, in Australia or Africa, in Europe or the United States -- even when cellular networks fail or are unavailable.

You can also keep using your existing phone number on the mesh.

https://play.google.com/store/apps/details?id=org.servalproject

Interesting. Until they have their Extenders out it will be limited to people within 100 meters or so. It has a lot of potential, but cell phone makers have to limit the broadcast functionality of their units I guess. Until then we need to get our Ham Radio licenses to be able to communicate without the phone networks.