Chivel (TM) Protector Bumper Case Frame Cover for Apple Verizon AT&T Sprint T-Mobile iPhone 4S 4 (Black / Red) 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 iPhone 4S stands out from others. You can ONLY use Apple synchronize cable when you wear this bumper This bumper does not have front/back plate.