title: How to get IOS device "its own" Bluetooth UUID pragmatically?
body: <p>I am developing an application that requires the ios device to provide its own Bluetooth UUID (not get the Bluetooth UUID from scanned/connected device), then send it to the server for further development. I can not find any answer on the internet.</p>
  
  <p>Question:</p>
  
  <ol>
  <li>How to get ios device "its own" bluetooth uuid pragmatically? (It is not another device's bluetooth uuid and it is not another device that connected to my device, then find my bluetooth uuid. It is the device own bluetooth uuid and get it without any connection to another device.) </li>
  <li>Is the bluetooth uuid unique? It seem that the bluetooth uuid will be changed every 15 mins, how to detect the uuid is changed? Can I set the custom Bluetooth uuid?</li>
  </ol>