title: Lollipop Device-Owner App breaks phone
body: <p>Thanks to <a href="https://stackoverflow.com/a/27009164/1720332">such so answers</a> I was able to setup a device-owner App on my smartphone. This is a very basic test app just made to enable / disable screen pinning mode...</p>
  
  <p>Anyway, at the end it works but with a very, very bad drawback : I've lost all access to the phone capabilities</p>
  
  <ul>
  <li>No more phone icon, except in the Settings > Applications > All </li>
  <li>If I call it, it's ringing on the caller side, but the phone does not react at all...</li>
  <li>However the status cellular icon indicates that it has 3G network. </li>
  </ul>
  
  <p>All of those symptoms are pretty weird and leads me to wonder if my tiny device-owner app is locking something somewhere : Would anyone have any thoughts or experience about this ? </p>