Does anyone know of a way to have two android phones communicate directly to each other without the use of a central server? (i.e. gmail.com) There is, of course, bluetooth communication between phones already, but I was thinking of something using wifi because it is faster, more secure, and has a larger range. I'm thinking of writing an app to this effect that would enable two or more android phones to share files, chat, or call each other even when out of range of wifi or cell towers. It might even be possible to bounce signals off other enabled phones to increase this range.