Several years ago I had 2 phones and it sucked, I liked my personal better and wound up calling cutomers on it then they started calling me back on it. It was just something else to carry around. I now save everyone's name and number and answer the ones I want depending on what's going on. Most of my customers aren't calling at off times. I think the worst has been around 830 or so at night.
Knowledge is knowing a tomato is a fruit, wisdom is not using it in a fruit salad.