Radio code I want radio code for my n70 mobile to listen without headset

You are combining two different things together.
Firstly you cannot play the Radio without headset and for just playing the radio you need not any Radio Code. Hopefully you need radio code to play Visual Radio. In that case you can play it even without knowing the code. Go to Station Menu in your GPRS connected N70 and then select the Country and the nearest location for getting a list of all FM stations alongwith Visual Radio information, if available.
Alternatively you can get more information about the Visual ID at www.visualradio.com