title: How to sign Android app with system signature?
body: <p>I've downloaded and compiled Android 2.1 version with <code>signed-google_ion-ota-14721.zip</code> image for my HTC phone. The compile completed successfully and so the system image flash.
  How can I sign my own Android application with the system signature? </p>
  
  <p>Can someone describe the whole process for signing a user application with system signature as I am completely new to the signing process. </p>