Other booster enhancements that have been proposed to the FCC include proximity detection to prevent cell tower signal overload and bi-directional signal amplification, which would improve signal transmissions from cellphones back to cell towers.

FORBES: FCC Decision On Cellular Signal Boosters Imminent

In the age of the Internet, automobile, and cell phone, the advantages of proximity are greatly exaggerated.

FORBES: Density Limits Are Urban Protectionism