Getting sim serial number, phone number and IMEI in android

package com.ui.yogeshblogspot;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.telephony.TelephonyManager;
import android.widget.TextView;

public class Main extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        //Getting the Object of TelephonyManager 
        TelephonyManager tManager = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
        //Getting the SIM card ID
        String simId=tManager.getSimSerialNumber();
        
        //Getting Phone Number
        String tnumber=tManager.getLine1Number();
        
        //Getting IMEI Number of Devide
        String Imei=tManager.getDeviceId();
        
        TextView s=(TextView)findViewById(R.id.simid);//Getting TexView from main.xml to Display SIM Card Id
        s.setText("Sim id - "+simId);//Displaying SIM card Id in the TextView
        TextView t=(TextView)findViewById(R.id.phoneno);//getting TextView from main.xml to display Phone Number
        t.setText("Phone No - "+tnumber);//Displaying the Phone Number.
        TextView i=(TextView)findViewById(R.id.imeino);//Getting the TextView to display IMEI number
        t.setText("IMEI number - "+Imei);//Displaying IMEI number
        
        
        
    }
}