I don't really like being on someone's GPS monitor like that, and I also don't like the idea of being expected to worry about being contacted while I'm in the middle of something else. It's just too distracting. Also, I don't really want to pay for it and worry about calculating how many "minutes" I have or what times are reasonable to make calls. It's cheaper and more convenient for me to just get unlimited long distance from the phone company through the land line. Especially since I hardly ever go anywhere. Lastly, I've had the same phone number for 10 years, and it took me 6 years to memorize it the first time... I don't want to change it and go through that memorization process all over again, in addition to having to tell people I changed it.