Normally, we need to save the number in our phone before start sending a message via Whatsapp. Do you know that we can do it without saving the number in our contact list. Here is the trick how to do it with a very simple way.
Just open your web browser and type this wasp.my/ followed by the number. However, the number must start with number 6 to indicate the country code (Malaysia).
Example: wasap.com.my/601156560479
Try it !!!