title: Get my phone number in android
body: <p>How can I get my phone number in Android?
  When I use:</p>
  
  <pre><code>TelephonyManager tMgr =(TelephonyManager)this.getSystemService(Context.TELEPHONY_SERVICE);
  String mPhoneNumber = tMgr.getLine1Number();
  </code></pre>
  
  <p>and use:</p>
  
  <pre><code>&lt;uses-permission android:name="android.permission.READ_PHONE_STATE" /&gt;
  </code></pre>
  
  <p>it returns null, why?</p>