title: How to know device type
body: <p>I am trying to figure out a simple way of knowing what is my <code>Device</code> type.</p>
  
  <p>I already know about </p>
  
  <pre><code>  [[UIDevice currentDevice] systemVersion]
  </code></pre>
  
  <p>which give me the general type. </p>
  
  <p>But what I really need is to now wether it is 4, 4S, 5 or any other type of <code>iPhone</code>.</p>