WhatsApp – Chat Messenger
Change from SMS to WhatsApp and send pictures, videos, messages or call to your friends about the app. Here, the Internet connection is being used and not voice minutes of your contract. Create group chats and so always stay with your friends and family know.
Even if you were to miss a notification, or you have turned off your phone, WhatsApp stores your messages and makes them available to you as soon as you use the app the next time.