I think we’ve been getting off the topic to analyze R’ Wallerstein’s point.
I am one of those teens who would never be able to get around without my cellphone. (A point I made very clearly on one or two occasions when I accidentally forgot it at home and my parents, etc. couldn’t reach me. They never bothered me about ‘needing vs. wanting’ a phone after that.) Anyway, not only do I not have a Kosher phone, I have an LG Voyager which, if you’ll google it, you’ll find it’s quite the opposite. But I use the features (besides for the live TV, which I blocked) responsibly and it’s very nice to be able to listen to music, look up bus/train schedules, e-mail, etc. wherever I am. Do I need those things? No, but they’ve saved my parents a lot of trouble.
I really think it all boils down to finding the balance between the danger and the benefit. (And if this makes no sense, that’s what you get for posting at 3:00 AM 🙂 )