A new wave of mobile technology is on its way, and will bring drastic change.

Pressure is mounting for better wireless infrastructure. The rapid growth in data traffic will continue for the foreseeable future, says Sundeep Rangan of NYU Wireless, a department of New York University. According to one estimate, networks need to be ready for a 1,000-fold increase in data volumes in the first half of the 2020s. And the radio spectrum used by 4G, which mostly sits below 3 gigahertz, is running out, and thus getting more expensive. An auction in America last year raked in $45 billion.

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