Force webview to open whatsapp web in dekstop mode

Question

I'm trying to create an webview android app that opens whatsapp web, but whatsapp web shows another browser recommendations or update your browser. I tried many different user-agents with no luck. I'm new to this and this is my first app. I thought I'll start easy :')

    package app.whatstab;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;


public class MainActivity extends Activity {

    private WebView mWebView;
    ProgressBar progressBar;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mWebView = (WebView) findViewById(R.id.activity_main_webview);

        progressBar = (ProgressBar) findViewById(R.id.progressBar1);

        WebSettings webSettings = mWebView.getSettings();
        webSettings.setJavaScriptEnabled(true);

//        String newUA= "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.4)     Gecko/20100101 Firefox/4.0";
        String newUA= "Mozilla/5.0 (Windows NT 6.1) Gecko/20100101     Firefox/4.0";
        webSettings.setUserAgentString(newUA);

        webSettings.setLoadWithOverviewMode(true);
        webSettings.setUseWideViewPort(true);

        webSettings.setSupportZoom(true);
        webSettings.setBuiltInZoomControls(true);
        webSettings.setDisplayZoomControls(false);

        mWebView.loadUrl("https://web.whatsapp.com");
        mWebView.setWebViewClient(new HelloWebViewClient());


    }

    private class HelloWebViewClient extends WebViewClient{


        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon)     {
            // TODO Auto-generated method stub
            super.onPageStarted(view, url, favicon);
        }

        @Override
        public boolean shouldOverrideUrlLoading(WebView webView, String url)
        {
            webView.loadUrl(url);
            return true;
        }

        @Override
        public void onPageFinished(WebView view, String url) {
            // TODO Auto-generated method stub
            super.onPageFinished(view, url);

            progressBar.setVisibility(view.GONE);
        }

    }


    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event)
    { //if back key is pressed
        if((keyCode == KeyEvent.KEYCODE_BACK)&& mWebView.canGoBack())
        {
            mWebView.goBack();
            return true;

        }

        return super.onKeyDown(keyCode, event);

    }

    public void onBackPressed() {
        AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
                MainActivity.this);

        // set title
        alertDialogBuilder.setTitle("Exit");

        // set dialog message
        alertDialogBuilder
                .setMessage("Do you really want to exit?")
                .setCancelable(false)
                .setPositiveButton("Yes",new     DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog,int id) {
                    // if this button is clicked, close
                    // current activity
                    MainActivity.this.finish();
                }
            })
            .setNegativeButton("No",new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog,int id) {
                    // if this button is clicked, just close
                    // the dialog box and do nothing
                    dialog.cancel();
                }
            });

    // create alert dialog
    AlertDialog alertDialog = alertDialogBuilder.create();

    // show it
    alertDialog.show();
    }
}