All of this leads us to the first of five reasons why the iPhone 4S will be a powerful business tool. "What's in it for business users? Surprisingly, quite a bit," says Aaron Freimark, IT director at services firm , which helps Fortune 1000 companies adopt iPhones and iPads.

Since some Android phones support super-fast 4G LTE networks, tech analyst Rob Enderle and others figured Apple's newest iPhone would have to support 4G as well. "Another 3G phone would be a problem given the heavy push into 4G and would likely give iPhone 4G competitors an unusual advantage," Enderle told me in a discussion about the prior to the iPhone launch.

Never mind that immature 4G chipsets drain battery life like a sieve or that LTE coverage remains spotty as wireless carriers begin their rollout of the network. "It's the chipsets and faster wireless protocols that are really the battery hogs," says Kyle Wiens of . "Look at the battery life of every new 4G phone; it's not acceptable."

Needless to say, business users prefer battery life and coverage over a 4G marketing ploy. By not going with 4G, Apple has improved the battery life of the iPhone 4S: Eight hours of 3G talk time, 10 hours of video.