I just bought a universal dock and when I connected my iphone 4 to it I got this error message on the screen of the iphone 4 "This accessory is not optimised for this iPhone. You may experience noise caused by mobile interference and a decrease in mobile signal strength" iTunes gave me this error message. "iTunes could not connect to the iPhone because an invalid response was received from the device" but if I just put the iPhone 4 back in the dock it seems to work fine or could I risk damaging my phone? The above two error messages have only appeared once. The packaging doesn't actually say it supports the iphone 4, it only goes up to iphone 3g. The dock adapter numbers are 9,10, 12, 13, 14, 15, 16 & 17. I'm using the adaptor numbered 12 but I don't think it matters as long as the iphone fits on top? It looks the same as this http://store.apple.com/uk/product/MB125G/C?fnode=MTY1NDAzOQ&mco=MTg1MTEyNjI do I need an iPhone 4 adaptor? my iphone didn't come with one. http://store.apple.com/uk/product/MC598ZM/A?fnode=MTY1NDAzOQ&mco=MTg1MTEyODc I assumed all universal docks were the same accept for the updated packaging or have I actually bought the wrong one.