Hmmm... so much of those numbers are confused not by actual subscriber decisions though, but by mergers (Cingular/AT&T then Verizon/Alltel). It's very difficult to say how the iPhone affected market share because companies were busy buying and selling subscribers. I'd like to see new user contracts between June 30, 2007 (iPhone release) and now. But... not enough that I'm going to go digging.