Whatsapp has became the go to messaging app of all time and for all typea and people of any age group.
Everyone nowadays has a smartphone big or small and you wipl find atleast 2 apps for super 1 , whatsapp 2, facebook.
Whatsapp provides very nice facility of sending pics and videos as well. You can record audio directly from the screen and have a interactive experience.
The best thing that it works on 2 g perfectly.
The whatsapp call has also started to work very nicely nowadays.
Overall its very good.