title: Call to a phone number through iPhone App
body: <p>I want to add features in my iPhone app:</p>
  
  <ol>
  <li>call to a phone number in my app</li>
  <li>play a recorded mp3 voice to that number</li>
  <li>after call ends, relaunch the previous app</li>
  </ol>
  
  <p>I know I have to use following code snippet for dialing to a number XXXXXX:</p>
  
  <pre><code>[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"tel:XXXXXX"]];
  </code></pre>
  
  <p>My be play record not worked, as my app will terminate when call dial launch.
  Is there any way to do this?</p>
  
  <p>And, after the call ends or fails, will my previous app relaunch?</p>