Universal links are the preferred method of linking to a WhatsApp account.
Use
https://wa.me/<number> where the <number> is a full phone number in international format. Omit any brackets, dashes, plus signs, and leading zeros when adding the phone number in international format.
Examples:
Use:
https://wa.me/15551234567
Don't use:
https://wa.me/+001-(555)1234567
Universal links can also include a pre-filled message that will automatically appear in the text field of a chat. Use
where
whatsappphonenumber is a full phone number in international format and
URL-encodedtext is the URL-encoded pre-filled message.
Example:
https://wa.me/15551234567?text=I'm interested in your car for sale
To create a link with just a pre-filled message, use
https://wa.me/?text=urlencodedtext
Example:
https://wa.me/?text=I'm inquiring about the apartment listing`