title: open contacts app form iPhone application
body: <p>I would like to open contacts app form iPhone application,</p>
  
  <p>I have found reference to open the same using the following</p>
  
  <p>ABNewPersonViewController or ABUnknownPersonViewController</p>
  
  <p>but this is not in my case.</p>
  
  <p>I need to open "Contacts" from a URL scheme, but no URL scheme available for it.</p>
  
  <p>Please help me on the same.</p>
  
  <p>Thanks in advance</p>