Do you sometimes forget to switch your ringer off once you hit the office or classroom?

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Find My iPhone has a great feature: From the iCloud.com Web site, you can make the phone ping, very loudly, for two minutes, even if its ringer was switched off.

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If a truck looms out of the blind spot during a high-speed freeway merge, for example, a driver would be better off if his phone's ringer was disabled at that moment, he says.

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