Ive just got my new iPhone this week and I basically use it for surfing the webpage and twitters, until today I got a call from my girlfriend but weird things happened. Yosemite also receives the call but when I hit accept on the phone, the Mac keeps ringing. pressing decline may hangup the call so I just muted my Mac for a while. After this I did some experiments it turns out to be that the mac will never stop ringing if there is a incoming phone call. I can answer it or decline it one the phone but the mac just keep ringing ( yes! even if I hit decline on the phone) until forever or I manually do something. (iPhone is at iOS8.0.2 and mac is yosemite GM candidate 1) The worse is, you cannot even change the ringtone in FaceTime app on Mac. Everytime I got a call I have visual notification on the display I don't need a loud sound.