I have bought my mobile last year.and then I had installed whatsapp on my mobile.it all fetaure is awesome.mostly I like its video call fetaure.video call feature give whatsapp last 3/4 month ago.i and my whole family and my freinds only use whatsapp for chat and videocall. Its sent messege very fast.its networking system is good.when I video call on my freind. I feel the reallity. Its picture quality is very hd. I sent many image, document, pdf file and video on my freind.its grouping feature is awesome.i have joined many group on my whatsapp. I love whatsapp