On first connection with iTunes synchronization is successful, then it is impossible to redo a second time, the computer does not detect the i-phone recharge it only the battery. Only solution on again and synchronize wireless Wi-Fi, and then turn it off to save battery power. It was too simple to simply plug. On the doc adapter plugs correctly but no music. I'm disappointed for the Iphone 4 I had a power-box cheap Chinese and everything worked and now I have to change the dock and remove the power box each time to listen to music. In fact during 1 month since after plastic breasts are worn and the power box will no longer close. Short for a phone to 700 and a power box 100, you must buy a dock to X, and change sockets, etc.
Always ALL change when buying new appliances and worse when buying accessories. Brief save the planette