Teaching pre-schoolers to use the phone

I've been updating the family address and phone list. Everyone seems to have 2 phone numbers and work numbers, and e-mail, and they keep moving! It's getting a bit long now that more of my nieces and nephews' children are college age and they too have cell phones. My niece told me a funny story about her youngest, a very lively and challenging little boy.

"When he was three, we let him have an old cell phone to play with. I was having an especially crazy morning (oversleeping, running late, getting Wy ready for school, the dog had terrible "stomach" problems all over the carpet, etc. etc.) Wy was having a very long "conversation" with his sister on his cell phone. I was impressed at how long the conversation was and actually was thankful. . . it gave me a chance to clean up the carpet mess. I finally told him he had to tell her goodbye so that we could leave for pre-school, to which he said goodbye and then told me that she wanted to talk to me. I took the phone and quickly said goodbye. . . only to hear someone say, "Hello... Hello..." I was dumbstruck and asked who it was. She replied that she was the 911 operator. I was mortified. I had no idea that old cell phones, even when they didn't have service, could still dial 911. The pre-school had been teaching the little ones what to do in an emergency. . . dial 911. Upon further investigation, it seemed that this was the 3rd call that he had made that morning. He told her ALL about my bad morning, including all the gory details about the dog's mishap. I told her how sorry I was and she just laughed and said it was the best call she had ever gotten. Shortly after that is when I started noticing numerous white hairs. Wy definitely keeps us all on our toes and laughing pretty much on a daily basis.