: Wireless telephones ?  Some of them operate in 900 mhz
902-928 MHz is license free in the US and has been filling with gadgets for 
a couple of decades, nearly worthless now with the congestion, could be any 
one of many millions of devices sold in the US yearly.  If you know the 
frequency, monitor with a receiver and see what's there.  I live out in BFE 
and have equipment on 434.500 and 915.0 rendered non-functional at times 
with near continuous consumer device operation ranging from a few thousand 
feet away to a few miles away.  Think of 900 MHz now like CB in the 
seventies, times one hundred.
Kurt 
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