title: Root vs system signature
body: <p>What are the differences in priviledges in Android of root access vs system signature?</p>
  
  <p>I'm having trouble uninstalling a system app with system signature, and I read that it can be done via root.<br>
  Can someone explain conceptually what the differences are?</p>
  
  <p>In the end I want to know how to programmatically uninstall a system app.</p>