title: Unity android build error: INSTALL_FAILED_VERSION_DOWNGRADE
body: <p>I built my android Phone app using Unity. I didn't use eclispe, only unity. </p>
  
  <p>I keep getting the error message "INSTALL_FAILED_VERSION_DOWNGRADE" when I try to push the android package onto my device.</p>
  
  <p>I cannot find out what is wrong.  Help me please.</p>
  
  <p><a href="http://orizun.com/220138349709" rel="nofollow">http://orizun.com/220138349709</a>  link image click~~</p>