title: Get Date of phone activation
body: <p>I'm trying to get the date (in <code>millis</code> or <code>Date</code> or <code>Calendar</code>) of when the phone was <strong>activated</strong>.
  By activated I mean the first time it was turned on or the first turn on after it was formatted.</p>
  
  <p>Is there any API to do that? Even an approximation would be sufficient.</p>