For those looking for an FM Radio, check out "NextRadio"
https://play.google.com/store/apps/details?id=com.nextradioapp.nextradio
EDIT - went back and noticed -
True. FM Tuner is gone, and I'm super irritated. Used it all the time to tune into TV's at the gym. Had to install an app (Next Radio). But it runs off data/wifi, so can be prone to bad lagging and cutting out. I'm hoping they push a patch or something soon. Seems ridiculous to me that they have a phone with a built in tuner, but now don't give a stock method to use.
I think that the network part is just supposed to support purchases.
Sounds like a good app to block with a firewall and force FM only.
I'll keep looking for a non-root solution for y'all.
EDIT 2 - found on Sprint support site -
Install the (free) NextRadio app (NextRadio - Android Apps on Google Play). Open the menu of the app and select "Basic Tuner" towards the bottom. I have tested this and it appears to work.
If you want, you can go into the settings of the app and switch it to "Basic Only" mode (under "Interface") which means it will always function as just a normal FM Tuner (no fancy loading of images and all that).
EDIT 3 -
OK, I confirmed that works.
There's no RDS data support to show the station or the program like on the HTC, but you can set it to pure FM radio and it works.
I confirmed that by blocking it with my root firewall.