Whats app very amazing massaging app used in all over world, I used whats app from so many days, its totally free no cost for it. I talk about it feature you send massage as well as photos, videos(Max 16MB), audios, contact and as well as location of your currently position. it upgraded system have so many amazing feature like whats app call, whats app video call in free only data charges will apply. and very new upgraded system contain status contain in which you put a image on status for 24 hours. and you massage even in low net connection it best for forwarding some important data and image from one point any of world. very usefull I like it too much