Citadel Securities analyst Shing Yin via a phone interview with Wired:
The main thing for Apple is increased distribution, which is more important now than when the iPhone was first released.
When the first iPhone was released on June 29, 2007, Apple was the underdog and AT&T was willing to take the risk. Not today.
Will the next iPhone be available on Sprint? I don’t see why not. This is mere conjecture, but by using a Qualcomm chipset that supports both GSM and CDMA networks, the next iPhone should be network agnostic.