I just got my bill online today. As I was going though it I noticed my daughter's line had a much higher charge than usual. I figured she went over her data plan so I started looking. Turns out it was the one-time upgrade charge when she get her new 4S last month. But then something else caught my eye. She is on the 2GB/25$ mo data plan. But her data charges last month were $25.83. Hmmmmm..... Looked again to see if she was over - Nope. Used 1.522 of 2. So good there. It turns out that when she upgraded, she used her a partial month data plan on her old phone from 8/9 to 8/17 and her new plan from 8/17 to 9/8. She got charged for 8/17 going off the old plan and coming on the new plan (not really a new plan, but new phone). That $0.83 difference - $25/30 = .83. Got charged for one day twice. Now not a big deal to me, but if they do this on every customer that changed phones, it turns into big money for them. So, should I go in and cost them $0.83 of CSR time by bitching about it? Maybe next Friday morning.