title: How to detect SIM card in android 3.0?
body: <p>I am new to use of android 3.0 or we can say android tablet. I want to know how we can detect a SIM card in tablet/android 3.0? Can anyone give me the example code.</p>
  
  <p>EDIT:- 
      My requirement is when some condition is match then I want to unmout SIM card. I mean user is not able to use the service of SIM card. Can we do this?</p>
  
  <p>Thanks in advance.</p>