The whatsapp replaced by sms which was very expensive, in the present generation whatsapp is key role in the text message.
We can create grous, we can upload vedios, we can call to each other otherside also having whatsapp, in the google store it was avilable it was very nice to install in our smart phone, it was very easy to send text message to our lovable one I love whats app, with out whats app we cant imagine text messages and sms