How Does WhatsApp Work
WhatsApp Messenger is a cross-platform mobile messaging application for smartphones.
It allows the end user to exchange messages without having to pay for Short Message Service (SMS).
This app works on iPhone, BlackBerry, Android, Windows, and Nokia phones. WhatsApp Messenger uses the same Internet data plan that you use for email and web browsing. There is no cost. You can create groups, send, and receive unlimited images, videos, and media messages.
Download the app to your device. It will create a user account using your phone number as your username. Both individuals will have to have the app on their individual device for the free service to apply.