I HAVE DONE MY OWN TESTS WITH THE BOOSTER. THEY DO WORK I LIVE OUT IN THE COUNTRY, BEFORE I HAD A BOOSTER I COULD ONLY GET 1 BAR IF THAT. I TRIED THE BOOSTER ON THE CELL PHONE AND I STARTED TO GET 2 AND 3 BARS! NOT THE GREATEST. I TRYED 2 BOOSTERS AND IT WAS ALMOST THE SAME MOSTLY 2-3 BARS. I COULD AT LEAST GET A SIGNAL MOST OF THE TIME AS BEFORE I HAD IT. IT WAS SPOTTY I WOULD HAVE TO STAND WITH MY CELL IN THE AIR. I BELIEVE IN THE PRODUCT AND STAND BEHIND IT 100%. IT HELPED ME!