title: How to get device ID on tablet Android 4.0.3 like android-xxx
body: <p>My device ID in ABOUT PHONE is <code>unknown</code>, so I can't get ID by API <code>android.os.Build.SERIAL;</code></p>
  
  <p>I tried to get Mac Address as Device ID, but it's not working when I turn the wifi adapter off.</p>
  
  <p>I know there is a device ID like <code>android-xxx</code> when I connect my device to wireless network, how can I get that device ID???</p>
  
  <p>Please help me :D</p>