title: Is the iPhone Simulator UDID unique for each installed instance?
body: <p>i.e. does this call:</p>
  
  <pre><code>NSString *udid = [UIDevice currentDevice].uniqueIdentifier;
  </code></pre>
  
  <p>return always the same UDID when it is executed on the iPhone Simulator on any mac computer or not?</p>
  
  <p>Currently the iPhone Simulator on my computer returns "2BA99337-3AE2-5234-93DA-193703B876F8".</p>