The function of copulation calls in female primates has been debated for years.

BBC: Monogamy shunned by female chimps

Before departure, he said, find out whether your phone will work at your destination, and if so, whether you can activate the international roaming access function that would allow you to receive and make calls.

CNN: Navigating cell phone headaches overseas

In the past MBAs could hope for what he calls the "classic triple jump": a change in function, role and location.

ECONOMIST: MBA careers special

And it should function without the user having to switch SIM cards, pay outrageous roaming fees or deal with dropped calls.

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