Working from home...?

Question

I work for this guy doing data entry from home. I've only worked with him for three weeks now, and we were talking on the phone pretty often during the beginning, but we mostly communicate through e-mail. He told me to call him if I ever have any questions, and I haven't spoken to him over the phone in a week (just through e-mail). I haven't had any questions to call him for, but is this bad workmanship? I feel like the work relationship between us isn't as good and am afraid of him finding a better worker...