CELLULAR SIGNAL BOOSTING

Dropped calls and slow data are generally caused by three things - distance from a cell tower, building materials in your home or office, or obstruction from tall objects such as trees, topography, and buildings. 

Signal boosters increase cell signal by collecting signals with a powerful antenna, delivering those signals to the booster, amplifying the cell signals so your devices receive them, and delivering your device's boosted signals back to the cell tower.