I was deep in the upper Mojave Desert.  I've been to remote places like this and have not had any reception.  When I pressed this into service I had 4 full bars of service in the middle of nowhere.  I would however would advise that anyone considering the purchase of this kit, instead purchase the one with the cell phone antenna cradle instead of the bar antenna.  It's the black item on the right.  It is necessary to have that antenna as close to the phone as possible to achieve the highest performance.  So the universal cell phone cradle antenna serves that purpose much better.  I also have used this amplifier in town, and it shines when I get to areas where I've had weak signals in the past.  This booster kit works wonders.  It's highly recommended.