Easy established very fast and getting popularity at the same time, this is proved by WhatsApp. Who have smart phone, they have what'sApp. Nice, I relief from hesitate from sms characters limit, mms charges. Very useful for sending messaging text, photos, videos to friends.
It is used for chatting with text, making voice and video calling, and you have also open what's app in desktop also by using web what's app. Group facility is available for creating groups like friends, family, work, business etc
