title: Developer version of Android OS
body: <p>I am trying to follow the link <a href="http://developer.android.com/tools/debugging/debugging-ui.html" rel="nofollow">Here at the official documentation</a> to check hierarchy viewer and pixel perfect tools. However the functionality I am checking is not possible to test on an emulator due to its limited capability. So my next target is a real device. However the document states: <code>To preserve security, Hierarchy Viewer can only connect to devices running a developer version of the Android system.</code> Now my next target is where to find the Developer OS and how to install it, is there any comprehensive guide for it or any resource, link which serves as a tutorial. Plus a source to download this particular OS? Also is it necessary to have a Google phone? Can't I use a simple android phone which does not come from Google? </p>