AT&T 29998 Charging Data Cable for Original iPhone 4/4S - Retail Packaging - Black This cable is compatible the unique Zero Chargers and many other USB based charging adapters. This cable is tested and certified by AT&T and measures in at 3 feet 5 inches. This unique cable can also be used to sync data or charge from your PC or laptop. This is a simple and straight forward 30 pin cable for your Apple iPhone models. Compatible with the Apple iPad, iPad2, iPad HD 3, iPhone 4S, iPhone 4, iPhone 3G, iPhone 3GS.