title: apple device UUid getting changed after installing the updated version on IOS 7
body: <p>To getting the user's device UUID in <code>objective c</code> I have using </p>
  
  <pre><code>[UIDevice currentDevice].identifierForVendor.UUIDString 
  </code></pre>
  
  <p>In ios 6, now when I am trying to download the IOS-7 version of that app whole UUID getting changed. Not getting any clue how to solve this.</p>
  
  <p>It's looking like this, </p>
  
  <p>When installing the <code>IPA === 0849EC56-XXXX-XXXX-XXXX-EF1625FB58C8</code>
  ​After downloading the same app from app store it's giving <code>UUID  - 285E6931-XXXX-XXXX-XXXX-08D85052E180​</code></p>