Even when my H and I were getting along fine, we used to have phone issues. I could be at work doing a phone interview for a story and he'd call on the other line. I wouldn't answer because I was busy. Then he'd call my cell, which is fine since he didn't know if I was out of the office. But often he'd then call the office phone again. God forbid he couldn't get me immediately.
On the other side. When he would go out with some of his friends after work he would never even check his messages. I could call at 6 and not hear back until he was on his way home at 10. I've often wondered if this is because they don't want to appear to be told what to do by their W in front of other guys. Then again, I have been wrong before.