title: signature protection level - clarifying
body: <p>As I am new to Android, I wanted to ask something which is not clear enough to me. I read the <a href="http://developer.android.com/guide/topics/manifest/permission-element.html" rel="noreferrer">API guide</a> about the permissions as a lot more Q&amp;A considering this topic, still, I am not sure if I understand it correctly. So, signature protection level is: </p>
  
  <blockquote>
    <p>A permission that the system grants only if the requesting application
    is signed with the same certificate as the application that declared
    the permission. If the certificates match, the system automatically
    grants the permission without notifying the user or asking for the
    user's explicit approval.</p>
  </blockquote>
  
  <p>Does this mean that I am not able to use any permission with 'signature' protection level, so all permissions defined in the Android's API and having such protection level are unavailable to anyone, apart the team which is developing it?</p>