With the new version of Whatsapp, a feature called Whatsapp web has been added while a web version you can use on your laptop has been launched.
To use it, you have to link your phone Whatsapp with the web version.
These are the three simple steps to doing it:
1. Go to this link.. https://web.whatsapp.com/
3. Go to Whatsapp on your phone and go to the menu
4. You will see an item named Whatsapp Web
5. Click on it, it will open a QR code reader..basically the camera set to read the qr code
6. With the qr code reader open scan the qr code on the computer screen.
7. You should be connected to WhatsApp Web and you can now begin using the web version. It remains on so long as your phone WhatsApp is on.
Android, Windows Phone, Blackberry, Nokia Symbian series. No version for the iPhone yet.