Sure, that's why a designated section on the plane would be ideal. People who want to use cell phones can and those who don't, don't have to hear them.
Cell phone blockers in commercial use are static units. The portable devices are the ones that look like cell phones. I agree that it would be kind of obnoxious for someone to use this abritrarily, deciding who can or cannot use their cell phones as opposed to an area ban like the other types (employed in churches, theaters and restaurants and hopefully lecture halls). Like the people who use the anti-seat recliner device, really obnoxious. Either we all can recline or none of us recline (LOL).
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