title: Using Telephony Manager in android to find IMEI number
body: <p>I m very new to Android Development.
  I want to find the IMEI number of the phone and using "android.telephony.TelephonyManager;".</p>
  
  <pre><code>TelephonyManager telephonyManager = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
  telephonyManager.getDeviceId();
  </code></pre>
  
  <p>Now the compiler says.
  Context cannot be resolved to a variable.
  Any one can help me ? What step I m missing
  I have also included user permission in XML.</p>