I do. It's good to have a few numbers memorized. What happens if your phone dies, and you need to call someone? If you don't know any phone numbers, you have a

I do. It's good to have a few numbers memorized. What happens if your phone dies, and you need to call someone? If you don't know any phone numbers, you have an problem. I dial a few of my contacts by number, just to set them in memory.