All four daughters and I are using iPhones. The one great feature of this Smart phone is that we could call, text and video call each other for free. Since we really 'love' to chat simultaneously, we thought of downloading Viber. This way, my son is included in the group. The trick to surviving Viber is to read the messages as soon as possible. One time, I did not bother to read the messages at once since I was busy doing something else. When I was ready to read the messages, there were close to 200! Now, why should I read all of them? Well, no one pushed me to read them but if I didn't, I'd be left out of the "conversation". It would be harder to "catch up".