The bumper hasn't completely eliminated the reception issue. At least when attempting to use the iphone 4 inside my house where I don't get greatest AT&T reception. I typically get 2-3 bars, occasionally going up to 4 bars. Without the bumper, I can consistently get the phone to lose reception completely with left-handed death grip. With the bumper I bought this morning, the phone still loses a couple bars, down to 1 bar, still allowing me to make calls. However if I go outside and walk down the block where the AT&T signal is 5 full bars, I don't lose any bars with the bumper. Without the bumper, I lose a couple bars.