i put the antenna and i now telephone come up on my navi screen. but i can not link it to my phone. i do not have a snap in tray. do i need one? or is a snap in tray for charging the phone. i know i have a microphone because i accidently hit emergency and the SOS buttone started to flash, a lady started to talk to me and we had a conversation. so i dont have to worry about a microphone. i now need a phone that is compatible with the unit and then need to link it.