convenience

The cameras in many new smartphones are becoming so good that they may spell trouble for the average point-and-shoot camera.

And in addition to the convenience of carrying one device, they've also streamlined photo sharing.

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Americans are increasingly using hand-held devices to access the Internet and for texting, sending e-mails, playing music and instant messaging.

A large number of those hyperusers are young Latinos and blacks, who crave the convenience of staying connected wherever they go.

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