title: How to List contacts of those having the same app installed
body: <p>I'm building a Hybrid mobile app using phonegap with cordova. This is like a social app like whatsapp. I need to list the contacts inside my phone having the same app installed. How can I find-out the contacts of those who installed the app. I know we can read the contacts and post it to server for identifying the users. Is this the way to do that, or anything better are there?</p>