FM-radio returns to the supported hardware in Windows Phone 8 'GDR2' (8.0.10327.77/78).
It is unclear whether API support is returning and how it behaves:
Attention:
FM radio is only supported in applications designed for Windows Phone 7.1. If you use the FMRadio class in applications designed for Windows Phone OS 8.0 or later, RadioDisabledException indicates that the FM radio function is not available. On Windows Phone 8 devices with build 8.0.10322 or higher, a runtime exception may not occur if you use the FMRadio API. However, the FMRadio API is not supported for applications that target Windows Phone OS 8.0.
In other words, the Windows Runtime Windows API does not exist for radio control.
I just tried the FM radio app from the store, which really works.
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