Can anyone tell me why iTunes radio is unavailable on iOS devices.

Same here... Hasn't worked in 3 days. I tried everything these forums tell me.... No luck

I am receiving the same error. I've tried all the fixes on the site also. Restating phone, signing out my Apple ID, tapping the next song quickly. All to no avail. :-(

Unfortunately, the only thing that fixed mine was to erase all content and start from scratch...