All of us have cells - meaning there are 4 in this house. However, we also keep our land line. DH often works from home, and his job involves conference calls for hours on end. The cell just wouldn't work for that.
When my dad moved here to live, we added him onto our cell plan, but he got a land line packaged with his cable that is reasonable, so he's got both again. My only problem is that he never answers EITHER phone :P How am I supposed to check on him if he doesn't answer? His health is good, so I don't worry at this point, but the day is coming where that will worry me...