This repair option is for the "Do it Yourself" iPhone 4 dock connector replacement. You may need this iPhone 4 repair part if your charging dock (dock connector) is broken or malfunctioning. This particular iPhone 4 repair part is for the iPhone 4 CDMA (Verizon) model only. The dock connectors on the GSM/CDMA models differ slightly, so make sure that you are selecting the right part for the job. As always, we only use the highest quality parts for our repairs and the same goes for our "Do it Yourself" options.