the option you are suggesting is using data for stream radio...
I am talking about genuine radio... It is present on hardware, but many times disabled for some reasons for some phones.
Your proposed solution is not good.
Just got myself A20 from MetroPCS. However, cannot find the app for it on the phone.
I know other A20 phones have it,
How do I enable FM radio on my A20 phone?
As another poster pointed out, go to play store and download app called: NextRadio. If firmware of the phone allows it, you will have FM radio, if not, the app will tell you