If your boss is smart, he or she will occasionally sign on to your computer and check your browser history.

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Mr Ackermann, a 53-year-old Swiss who joined the bank from Credit Suisse in 1996, has fought a smart campaign to become the undisputed boss.

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The two technologies are quite similar, says Dennis Sverdlov, Yota's boss, but he expects most smart-phones to come with LTE, so he will use it.

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"He was a smart and hardworking guy, " says his ex-boss, Richard Campbell-Breedon, a Goldman partner.

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As these devices pop up everywhere, there has been a recent spate of articles about smart-phone "manners" -- as if using your phone when your boss, or your mother, is talking to you is just a matter of poor training on their part.

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Patricia Clarkson is Sharon, the intelligence-group boss who hires Sarah after warning her about the dangers of the ego, and of being too smart.

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