Took my IP4 out of the bumper for the first time today to clean the gunk that had collected around the rim. Gave the phone a good cleaning with Lens cleaning wipes (Zeiss from Sams Club, works great on glasses, cameras, etc.) and also gave it a close inspection. Found no scratches on the front or back, nor on the metal band. Thought I saw the band scuffs others had reported from bumper-shifting, but it was just gunk that wiped off. Tried the antenna touch and it took the phone from 3 bars to 1, but did not loose signal like it did before the patch. With the bumper on I could not get a signal reduction with either a spot touch or death grip.