Don't take it personally I don't like to talk on the phone either. I rarely answer it, I just call back when people leave messages. Like your brother did. Your Mom is right, he doesn't like to talk on the phone, and when I do I like to get off quick and say I have to go somewhere or have something to do. I have to talk on the phone at work, so when I am home, I don't want to do it.
I like email a lot better. Can you email him? He may like that better.