How do you turn on the auto answer on an Iphone 4. I ride a goldwing motor cycle and have no way to push any buttons inside my helmet. My gl1800 comes with a built in system that has an on-board blue tooth. I had a Motorola phone that used a wired connection and the auto answer feature was perfect. I moved (up) to this phone, but can not use it if I can not find the auto answer settings?