GoodsCity Black USB Charging Charger Dock Port Connector Flex Cable for IPhone 4S 4GS+ Tools with 5 Point Star Pentalobe Screwdriver Color: Black Charging Port Dock Connector Flex Cable for Black Apple iPhone 4S AT&T, Verizon & Sprint Model A1387. A technician is required, or refer to online tutorials. Instructions NOT included. You need to slide the rubber cover off the microphone attached to the old dock connector and transfer it to your new dock connector. If your microphone does not work after replacing your dock connector, the issue may be that the rubber cover is not positioned properly on the mic cable.