"The iPhone 5 represents a brave new world that many of us will likely, in hindsight, regret," he concluded.

Mark Urban, senior director of product marketing at Blue Coat Systems, said many IT shops are still in reaction mode to the flood of smartphones and tablets used by workers, so the newest iPhone continues to put businesses on the defensive. Blue Coat sells hardware to help help maximize corporate network efficiency.

"There are twice as many mobile devices per user compared with just a few years ago and each device is driving 10 times to 100 times more traffic," he said. "Our conservative estimate is that each mobile device has the potential to contribute 15 GB [per month] of traffic to the corporate network."

That could mean a doubling of the telecom service budget for a business, Urban said.

Troy Fulton, director of product marketing for Tangoe, a telecom expense management provider, said the iPhone 5 will create a "dramatic uptick in demand on IT staff" because it will be so popular.