title: Apple mobile device UDIDs unique across vendors?
body: <p>Are unique device ids (UDIDs) of Apple's mobile devices (iPhone, iPod touch, et cetera) globally unique even across vendors? Or is it possible some HTC phone has the same id?</p>
  
  <p>This is important for multi-platform apps when you want to filter out duplicated requests on the server side. So the request must be unique across platforms and i want to ensure Apple's UDID is enough in this case.</p>