title: Android AlarmManager not working on some devices when the app is closed
body: <p>I am trying to run <code>IntentService</code> as such from <code>AlarmManager</code> <code>setRepeating()</code> for every half an hour. I want to send a to broadcast, from broad cast to intent service. In the service, some functionality will be done.</p>
  
  <p>But, initially the <code>AlarmManager</code> in not triggering while the app is in closed state.  </p>
  
  <p>When my app  is running or in background state the alarm is working fine and when I close the app the alarm is not working in <strong>some devices</strong>.</p>
  
  <p>What should I do to run the alarm even if the app is closed?</p>