This repair option is for the do it yourself iPhone 4 dock connector repair. You may need this iPhone repair part if your dock connector (charging dock) is not responding or malfunctioning. This iPhone 4 repair part is for the iPhone 4 GSM (AT&T) model only. The charging docks on the GSM/CDMA models are different, so make sure that you are choosing the right part for the job. As always, iBroke only use the highest quality parts for our repairs and the same goes for our do it yourself options. We want you to have the most reliable material.