title: Check if UDID is real
body: <p>How can I check if the iphone/ipad UDID is real device using web-service? </p>
  
  <p>To explain that, i need to send UDID to my webservice to as a user id, but I need to avoid any fake UDID. </p>
  
  <p>Please tell me how can we can make that possible?</p>