At Last: Sprint to Get Its Own iPhone
The timing seems to match the latest rumors on the launch of Apple's next generation smartphone. The last set of rumors seem to indicate a launch sometime in October, with pre-orders beginning at the end of September.
Naturally, both AT&T and Verizon will ship the device at the same time. The last set of dates given were either Oct. 7 or Oct. 14, with Oct. 7 being seen as the date Apple is leaning toward.
The WSJ's sources also said that Sprint will begin selling the iPhone 4 at the same time, which makes sense, as Apple typically sells the prior year's model with a lower amount of storage and a analogously lower price.
The move will benefit both Sprint and Apple. For Sprint, it brings its lineup of smartphones to a level equal to both AT&T and Verizon, which sell both Android devices and iPhones. For Apple, it increases its carrier coverage, which it hopes will slow the continue upsurge in Android market share.
it is unknown whether or not the Sprint version will support WiMax, Sprint's current version of 4G. The answer will probably be "no," just as it's likely that neither the Verizon nor AT&T versions will have their 4G technology, LTE, either. Battery life alone is a major stumbling block for them.

Sprint CEO Dan Hesse
Sprint had more than 52 million subscribers at the end of the second quarter, less than 1/2 that of No. 1 U.S. wireless carrier Verizon, which had 106 million. AT&T had nearly 99 million subscribers.