title: How to send data from one android device to another?
body: <p>Hi all I was wondering what options do we have to exchange <em>data</em> between two different android devices?</p>
  
  <p>For example, User-A and User-B both installs my app. I would like User-A to send <em>data</em> (possibly just a simple message or user-A's location info) to User-B.</p>
  
  <p>The functionality I would need is similar to the functionality that <a href="http://www.whatsapp.com/">WhatsApp</a> has. However unlike WhatsApp, I do not have a server and I was wondering if we could do <em>data exchange</em> between two different android devices without a server?</p>
  
  <p>I was thinking we build it atop SMS or something.</p>