Whatcha think...

What is the age to give a child a cell phone?
Is there an "age"?
I think it should go on what the responsibilities are and what the reasons. I know that cell phone's have been requested, not only by my 12 year old but also by my 9 year old!! Yes, I have seen even younger with cell phones. Maybe they are necessary for these families, I am just not sure. I am really not ready to add that bill and that responsibility on!
What do you think?
Do your kids have cell phones?
Have you set an age or a certain responsibility level?
Or are you just playing it by ear like me?!