One tactic is to offload it to the fixed internet: the iPhone, for instance, switches to a Wi-Fi network whenever possible.

ECONOMIST: Saturated mobile networks

Boingo Wireless Chief Executive Dave Hagan said last month that his company was developing a Wi-Fi program for Verizon Wireless that would target Android users, for instance.

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Soldier Field, for instance, asks users to pay for Wi-Fi.

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