Good research
Compliments
When in a rural occupation like emt or farrier, they are often out of range of cell phone towers.
To rectify, they purchase these extenders.
The extender is little more than a power boost. But, a big power boost.
Some will boost the outbound signal as much as 32X.
IF and only IF, KBs phone was turned on in a truck, equipped with an extender, on high ground, with the right weather AND a cell tower pointed in the right direction
Then a single ping could be received in Idaho.
Mathematically, it is highly unlikely that the phone could send a stream of pings at that range.
But, since a phone is sending a stream of pings, it is possible that one could be heard on a tower 600 miles away.
You could not have a conversation at 600 miles, but it is very possible one ping could travel that far.
Is PF a farrier, with a pickup truck and an extender? I do not know.