Re: FM or No FM
Probably multliple confirmations already, but here's one more: Spirit 1 appears as "Spirit UL" (presumably for "unlock") on my Sony Xperia z3v and gives me at least 20 FM stations in San Francisco without further tweaking. It does require headphones as the antenna.
(Wonder if there's a way to satisfy the antenna requirement, but redirect audio to a suitable Bluetooth headset? Not critical, since at the moment I do have a headset and don't have a Bluetooth stereo headset. I've used a few in the past but they have been too lightly constructed and they fall apart too soon for the price.)