I have the SGS2, and I have downloaded FM Two0 and had no success with it. I posted a message on the TMobile support forums regarding this issue and the current response is that the FM tuner has been *removed* from their SGS2. That sux for me.
As I mentioned there, I know FM isn't a big deal for a lot of people, but it was a huge factor for me as I was looking to replace my old MP3 player which DOES have an FM tuner built it. Considering that I've had to rationalize the loss of the Exynos chip, Mali, and now the FM tuner, combined with the fact I'm getting feedback that people I call aren't hearing me clearly, and its getting really tough to rationalize the $$$ I've spent on this phone.
Thinking seriously about switching to the Amaze, but it's more money, or maybe some other phone if I can find it has an FM tuner.
Now, I would love to find out that the hardware really is there, and Tmobile just doesn't want us digging around for it, which holds out the hope a third-party ROM might take care of this issue, but I dunno.
Just frustrated right now. Shouldn't feel this disappointed over dropping $500+ on a phone.
-soonerdave