As with areas like expense, meetings, payment and risk, mobile phones and plans don't fall within the typical travel manager's bailiwick. Building on its language and Wi-Fi dialing capabilities, TripLingo is looking to challenge that norm. Its latest service helps companies that do not have a centralized mobile phone program to manage excess charges.

From one country or region to the next, there are loads of cell phone networks. Keeping track of them isn't a human task, let alone one for a busy international traveler. Knowing which plans to enroll in for lower roaming fees is . . .

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