title: What happens when app registers for location updates?
body: <p>I just wanted to know what happens, when i select <strong>app registers for location updates</strong> under "<strong>Required background modes</strong>" in Xcode for an IOS app. 
  <strong>VOIP</strong> provides <strong>aliveTimeOutHandler</strong> for specific duration. In same way, whether <strong>location services</strong> provides any <strong>aliveTimeOutHandler</strong> method? I am using IOS7</p>