He has got it all wrong... (Score 1)

The writer is assuming that Apple wants to tie iPhone to a single carrier and wants a piece in the carrier's profit. Both these assumptions could be completely wrong. First of all, a company like AT&T will never give a share of its revenue to Apple. More so, the subscription plan of iPhone is relatively so cheap (unlimited internet access), that I think, Apple must have bargained for a cheaper subscription plan for iPhone with AT&T. Now about tying up to single carrier, Apple would never have surely liked this option for its iPhone. Apple will surely earn more revenue if iPhone is sold with more number of carriers. This is something AT&T must have bargained hard with Apple in return for providing features like list of voice-messages and Wifi (AT&T could have disabled it on iPhone).