Chivel (TM) Indigo White Protector Bumper Frame Case Cover for Apple Verizon At&t Sprint iPhone 4 4S Silicon trim is a bumper that wraps around the side edge of the iPhone 4 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 4 or 4S stands out from others. Can ONLY use Apple Original Sycn Cable