For couples, a family plan is a great way to save money on cell phone services. Last month, my fiancé cancelled her account with Sprint and got a phone through Verizon. Since most of our calls are to each other (and the minutes don't count), we share a 700 minute plan for a total of $100 per month with unlimited texting. Over the course of a year, we will save about $240 in after tax dollars with this arrangement.
BTW – Verizon has been very easy to work with.