cell phone signals detecting when talking?

cmg83

New member
all of these new rules with driving in saskatchewan / north B.C. and not talking on a cell phone

i know your cell phone emits frequencies to the cell tower

But is there any "special" frequencies that it admits when you are physically talking on it..............verses it just being turned on but you are not in a conversation

the reason i ask is would it be possible to build a detector circuit for cars such that it would be able to sense if you were on the cell phone physically talking

there is no harm in having it on............but only when you are talking that it senses this

is it possible?
 
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