My son is 4.5 and a whizz at using the phone to play, watch movies, take pics, etc. Just this past week I realized it might be good to know how to use the phone. He doesn't know any of his numbers yet, but I taught him how to call someone in my Favorites on my iPhone. My favorites are my hubby and parents, so if I was in trouble he could call one of them and have them call 911. I guess we better start working harder on numbers and names and our address!
Using my iPhone, probably while BF, so excuse any typos