1. When you get an incoming message notification from Whatsapp on your phone do not tap the notification or open the app
2. Go into your phone settings app
3. Enable Airplane Mode. The airplane icon should appear on your
status bar.
4. Now you can read the Whatsapp message without fear.
5. When you have read the message close Whatsapp from the app
switcher (double click the home button)
6. Now that you have finished remember to disable Airplane Mode.
7. This messy trick ensures the blue tick marks will not appear on the
senders device once you have read their message.