Quick Whatsapp Message
...& avoid new Contact Creation
Insert the phone number to WhatsApp in format :
+<countrycode><Rest of digits>
:
Option 1 - If you are using a WhatsApp Installed device
Send 'Hi' on WhatsApp
Option 2 - Generate QR Code to trigger Whatsapp Message
Generate QR Code
https://api.whatsapp.com/send?phone=+608675309&text=Hi!
Source