title: Xamarin : Application not installed issue
body: <p>When I install my application in debugging mode on my Android mobile device, it seems to be installed.</p>
  
  <p>However, after signing the application and publishing it, it's not installed on my phone. (Release mode)</p>
  
  <p>It says: Application not installed.
  I tried a few things but cannot resolve this problem. I also tested with another Keystore but it still cannot be installed.</p>
  
  <p>I verified Xamarin Studio options but everything is OK, does anyone have an idea?</p>