Is there a “passive” cell phone repeater?
No, even though some people claim to make or sell them. Radio frequencies need power to be pushed, or repeated. That’s what cell phone towers are, repeater towers. They require huge amounts of power (just look at the size of the cables on one), like radio and television towers. If power was not needed to push the signals, your service provider would need only one tower to serve the world. In other words, if “passive” repeaters worked, there would be no need for “active” ones.
