Chivel (TM) White Gray Protector Bumper Case Frame Cover for Apple Verizon At&t Sprint iPhone 4s 4 Silicon trim is a bumper that wraps around the side edge of the iPhone 4S providing bump and shock protection. The bumper helps separate your hand from the phone's metal edge band minimizing possible signal loss. Make your iPhone 4S stands out from others. Can ONLY use Apple Original Sycn Cable