Chosen Solution
I have been using a Plilips docking station for the past two years,mainly to listen to radio, with no problems. The phone is suddenly displaying ‘This accessory is not supported by iphone’ and will not charge or work with the dock. Is there a fix for the problem?.
you could try cleaning both the charging port on the iphone and the port on the dock, if that doesnt work, most likely the charging port on the iphone needs replacing