Suppose my phone no is 9-112-345-678, I try given code
TelephonyManager mTelephonyMgr = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
String phoneNo = mTelephonyMgr.getLine1Number();
but its not giving any output when i install same application in samsung fit 2.2.1 O.S.
I also gave necessary permission
uses-permission android:name="android.permission.READ_PHONE_STATE"