title: iPhone is not calling given number, I wonder why?
body: <p>I have this code snippet,</p>
  
  <pre><code>NSString *number = [NSString stringWithFormat:@"tel://%@", phoneNumber];
      NSLog(@"%@", number);
      [[UIApplication sharedApplication] openURL:[NSURL URLWithString:number]];
  </code></pre>
  
  <p>NSLog output is,</p>
  
  <pre><code>2011-11-21 15:32:49.621 Tittle-Tattle[1743:707] tel://0413 883 245
  2011-11-21 15:32:56.914 Tittle-Tattle[1743:707] tel://0413 873 245
  </code></pre>
  
  <p>Everything seems okay, However my application isn't switching to Phone app and start calling this number. Any suggestion.</p>
  
  <p>Thanks</p>