Are you sure you tried to change the value not with Lumia registry editor? Root Tool have 3 registry editors: First one for all Windows phones, second one for Nokia Lumia, third one for Samsung. To perform the hack you should use first registry tool, but not the Lumia Tool.
The tool in your screenshot is different to mine. So perhaps I goofed. I don't recall there being more than one version of the tool? I just followed the guide.
The tool is one - it's called "Root Tool". When you open it, you'll see Tool Menu. Just tap at the first top button of this menu. Registry tool should be opened.
It's the firmware/OS/app bug. When you change to speaker mode, the FM Radio app will use phone speaker as an antenna LOL.Seems with this unlock Radio FM is working for me on Lumia 950 DS, thx valuxin for shearing this hack .
However when I change to speaker mode, I hear a lot of noise, buzz and hisses. On headset every thing is working with out this. What about US 950 and speaker mode are there any distortions?
Is this because of that bug that FM tuner is disabled by Microsoft?
That's strange, I found the exact opposite. Maybe they are having QC issues, and therefore decided not to support it.After playing with the radio, I found out that the radio in 950 is worse (signal reception) than the one in my 920 (which was worse than the one I had in my Nokia N8 ... hehe).
[conspiracy theory on]
Maybe this is was reason for disabling the radio ....
[conspiracy theory off]
Yeah I don't know, just know my 950 has pretty good reception, better than my 920 for sure. Who can speak to the vagaries of manufacturing?The FM tuner chipset is on the snapdragon808 itself, I wonder how they could get QC issues.