New Yorkers charge their phones outside of Setai 5th Ave. in New York, N.Y. on Wednesday, Oct. 31, 2012. Hurricane Sandy knocked out power for much of lower Manhattan, forcing people to find alternative ways to keep their devices charged.
NBC News
cellphone

FCC to hold hearings about post-Sandy cell coverage

A man makes a phone call next to discarded storm garbage in Coney Island, New York, Nov. 2, 2012.
Reuters / Brendan McDermid
text-messages

Verizon, AT&T waive various charges for Sandy victims

iPhone
Reuters file
hurricane

Wireless carriers gearing up for nor'easter

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Twitter bird
Twitter
Twitter

More than 20 million tweets sent as Sandy struck

People using cellphones
Reuters file
wireless-carriers

Text, don't call, once Sandy hits, say wireless carriers

Google's crisis map for Isaac.
Google
hurricane

Prepare for Isaac using Internet, apps