Specifically for the person who buys the whatsaap will have the reward of making a video call of 15 minutes at the time of making the purchase of the number. At the end of the month you will have your other rewards that you have when you buy the whatsaap♥. 
the time limit of the number is 2 months. after those 2 months you will have to send another 2800 tokens if you want to have the privilege of exclusive photos and one hour video calls.