Inauguration Day crowd may clog cellphone system

For months, the carriers have been preparing for a predicted explosion of cellphone traffic during inauguration weekend. Wireless operators say they plan to boost capacity at cell sites on the mall, along the Beltway and underground on Metro so that more calls can be placed at the same time. By the time Jan. 20 arrives, they will have spent millions of dollars to add staff for the event, but carriers still predict some hiccups.

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