WhatsApp.
WhatsApp is the one of the messenger which is most famous in world wide. By this we can in contact with the all of our friends and relatives etc.
By using this we can send messages, photos, videos, contacts very fastly.
It is the very good app for chatting with all.it works well in 2G network also. the messages delivered very fastly.
The graphics are also well in it and we can add our photos as wallpaper to it.
It has no advertisements. the minus is it do not have a stickers pack which is very funny and most entertainment in now a days.
Am using watsap from last 2 years. it is nice.
Totally I would recommend this to you all friends.