Whatsapp is very useful to me.I can messege my friends , share everythings such as pics, jokes etc. I use whatsapp more then any messaging app because it does not need balance to send messages.It connects me with my old friends.
This app uses your phone numbers and you dont need to change your number if you dont want.The messages with this app sends instantly, it works well even with 2G network also.You dont need to type same message to all people’s you can share message in one click.So this is a very nice app for stay in touch with our friends, colleageous.