title: What is the length of Android serial number (ro.serialno)?
body: <p>I get the serial no from</p>
  
  <pre><code>Class&lt;?&gt; c = Class.forName("android.os.SystemProperties");           
  Method get = c.getMethod("get", String.class, String.class );       
  String serialNo = (String) (get.invoke(c, "ro.serialno", ""));  
  </code></pre>
  
  <p>But what is the max. length of the <code>ro.serialno</code>?</p>
  
  <p>From the doc: <a href="http://developer.android.com/reference/android/os/Build.html" rel="nofollow">http://developer.android.com/reference/android/os/Build.html</a></p>
  
  <p>Seems it is missing?</p>