There are a lot of misunderstanding and ANGER happen. When we call someone with Whatsapp phone, the screen show us "calling" and a dial tone ringing. At this time, people who make the call think the phone that he/she call is ringing (THE FACT IS NOT, until the screen show "ringing"). So, it cause many misunderstanding. When we make traditional phone call, we will not hear a ringing tone UNTIL the phone of people we call is ringing. So, please upgrade it. Thanks.