In idle moments I sometimes consider cancelling my cell phone service. I do not consider this device to be an integral or vital part of my life. Do I use my phone everyday? Yes, I do. Could I get by without using my phone while also not missing out on signficant social interaction? I think the answer to this question is also yes.
I understand the arguments about the importance of cell phones, but these arguments are, at least in part, based on an assumption that the way Person A lives her/his life today is the only way Person A's life can be lived.
There are lots of ways to live: with a car; without a car; with a computer; without a computer. Where we fall in these categories will determine certain facts of our lives but will not necessarily affect the quality of our lives.
This last assumption, I think, is often the biggest hurdle to change. We fear that if one thing falls out of our stock of possessions, our quality of life will fall out with it. This isn't nearly as true as we like to think it is.