In order to chat with contacts on WhatsApp, everyone must have the application installed and their number verified on their phones. If some of your friends and family are not yet on WhatsApp, it is easy to invite them to join.
You can send a WhatsApp invitation via our Tell a Friend / Invite feature. This allows you to send an SMS or email with a link to the application. Depending on what phone you are using, you may also see an option to send an invitation on another messaging application, or to post a message on Facebook telling your friends about WhatsApp and directing them to a download link.
Note: If you choose the SMS option, standard SMS rates apply. We recommend that you make sure you have an adequate SMS plan with your provider before sending SMS invitations.
Not sure where to find this feature in WhatsApp?
WhatsApp Support Team