I recently got an official Apple bumper and I feel that the reception is a little worse when it is on vs. when it is off. I'm not at all testing Death grip, just regular holding of the phone with and without the bumper. It isn't so blatant that I put on the bumper and the # of bars plummet or I take it off and they instantly go up. More I am noticing during periods of wearing the bumper the phone has more 1-3 bars and when it is off I see more 4 and 5 bars. Anybody else noticing this?