In article 1f63bf98-f94d-4ccd-b3ec-8ca13e35b696
@v35g2000pro.googlegroups.com, (stan) says...

No; but apparently there are devices that can 'jam' cell phone
signals!
Not sure how they work but apparently they have been used in certain
secure buildings, to prevent cheating in areas where examinations are
taking place, to avoid interruptions during publicly broadcast
meetings etc. Maybe even in places of worship to prevent cell phones
from ringing during services.

You can get 12 volt versions that will keep other motorists off their
cell phones within 100-150 feet of your vehicle, too. Drive now, talk
later.

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