K.G.
We have 5 daughters. We don't allow cell phones unless they can pay for them by themselves, which they can't. most of their friends have phones, they are free to contact them by actually calling them.
My husband really dislikes electronic (typing) conversations. He said it leaves too much room for people to be rude and inconsiderate to each other. Emotion and voice tone is lost. It's easy for people to just say whatever they feel becuase they aren't looking at the other person.
Cell phones leave plenty of room for kids to be sneaky. You can look at the phone, sure, but you can't look at what's been deleted. Nothing good can possibly come from a kid having a cell phone. We didn't have them growing up, we had to actually talk to our friends.
If your daughter must have it, you may want to limit it. Addictions in the teen years is evident. Teens don't understand limits, they only see now. Texting, facebook, email all becomes an addiction. Just because it's not drugs doesn't mean it's not harmful.
Also, if you're a stay at home mom, there shouldn't be too much time where she is away from you and she can use your phone to call her friends. I would definitely keep the phone wiht me at night.
I hope this isn't read harshly. I'm really against cell phones for kids, it is making them completely unable to hold normal conversations, to spell correctly, and it puts them too much into the circle of self indulged teenagers, without much supervision.