After very good experience with a similar charging cable for Samsung mobile phone I decided on this cable to use my iPhone 4 back on-board power supply can. My spiral cable had failed me, after having previously tried the iPhone through the car to "catapult" (got stuck when exiting). Thank God did not The IPhone jack broken, but "only" the vehicle plug of the charging cable. I was skeptical because of the thin cable already, but just like the Samsung Loading flawlessly the iPhone 4. By Ausziehstop the cable length can be wonderful and adapt very quickly move back in with a (well hidden) push button also. So if you like I can choose between spiral and rolling cable, which I would recommend this Recommend variant.