nd receive messages addressed to that person with your iPhone, read on. (You don’t have an iPhone? see bottom)When you install Whatsapp on your iPhone, the Whatsapp application makes contact with the Whatsapp servers, and the Whatsapp servers will send you a verification sms with a code in it. Straight from that point a counter will start counting in the Whatsapp application. Within this time Whatsapp expects you to receive your verification SMS. If this period expires Whatsapp offers you several other authentication methods.