I have a new nano and the radio won't work. It says plug in the earphones to get reception which I have done, but nothing changes. I have tried two sets of earphones, both of which work when listening to music.
That's usually an indication that your headphones are not fully inserted. Make sure that the white part of the headset (or whatever color it happens to be) is flush with the body of the Nano and no silver from the plug can still be seen. The headphone jacks on the new 6G Nanos are a bit tighter than in previous generations.