So earlier this month due to their new unlimited mobile to mobile promotion, I dropped to the 700 min plan and signed up for unlimited mobile to mobile. I barely came under the wire with like 15 min left on my 700 min plan. I go over my bill and I realize there are mobile telephone numbers that AT&T is billing at regular minutes instead of mobile to mobile. In fact almost 150 min worth on this bill alone. That's a 150 min of rollover minutes that could have been banked for future use. Since I'm on a FAN plan, (AT&T small business is closed over the weekends) I'll have to wait till monday to call in and sort this out. I never even looked at the bill before w/1400 min and A list I always had a ton of minutes left over. Whether this is a simple mistake or a well calculated maneuver on AT&T's part, I suggest you go over your phone bills this month.