You have to stay alert whilst driving as the road is always full of people and with one wrong move you could take someones life. If you get a text/whatsapp message or a phone call it is better to wait until the end of the journey than risking peoples lives. Often when people pick up their phones their focus is no longer on the road and this puts everyone in danger.
This video by AT&T will send chills up your spine. It starts off by a dad dropping off his daughter and her friends to the swimming pool. Whilst he is stationary he decides to return a phone call he got during the way there. Watch what happenes after he picks up the phone call.