At&t's Family Talk plans do include unlimited mobile to mobile to any At&t cellular phone (whether it is an incoming our outbound call). There is a Family Talk 1400 plan that should suit your needs. It does include Rollover minutes and unlimited Night & Weekend minutes. I believe that the shared plans (w/ at least 1400 minutes) include "A-list" that allows you to setup 10 phone #'s (landline or other cell phone #'s that are not At&t). Hope that helps.
My wife and I use about 1200 minutes per month. The main call is between my wife and a friend in Maryland who is on AT&T. I need a plan that will allow my wife to call her friend without using the friend's minutes. Would Verizon's "Friends and Family" plan meet this need? Does T-Mobile have such a plan? I saw that CNET gave a good rating to the Samsung SGH-T249 (T-Mobile) phone. We need just the simplest, most basic phone. What plans/phone do you recommend? Thanks!