We share a car and a phone; under most circumstances, whoever takes the car takes the phone, too.
That being said, no; I don't use the phone much at all. I absolutely loathe talking on the phone, to the point that I have great difficulty calling, or answering calls from, people I genuinely care about (Interestingly enough, low-value contacts with a clearly defined agenda, like a doctor's office calling to confirm an appointment, are easy). This dichotomy between my strong desire to connect with certain people and my strong resistance to actually doing so is one of my greatest mind-fucks, which not only drives me crazy, but actively contributes to my social isolation.
No idea why this is so hard for me.