Since headphones are used as radio antenna, I suppose it's very device-specific code involved. And because of that, you can't be very hopeful about the FM radio app. Maybe someone ports the original work, but as far as I know, it'd mean a lot of work. You could try to pay for some unofficial replacements (spirit2 is here: https://play.google.com/store/apps/details?id=fm.a2d.s2), but I still haven't found the free app that works.
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