Originally Posted by sensboston
As far as we know, there is no documented way or API to change system-wide volume on WP8, however...
It looks like author of the Quiet Hours application found an udocumented way to do this! Probably he is using ISimpleAudioVolume interface but I really don't know...
P.S. Guys with interop-unlocked handsets: could you please install the app and download/post the executable/assembly?
I tried this app it didn't work for me i set time but it can't set my phone in silent mode.
I'm really interested that this app can change system volume.
I remember there was an app for fully unlocked wp7 devices to change system volume but now i can't find it.
Maybe Ativ S users with Interop Unlock and Full FS can help with this. They can get app files and upload them to check how is it possible.
I looked for decrypted xap file but i didn't find that
---------- Post added at 05:25 PM ---------- Previous post was at 05:22 PM ----------
no quiet hours dev is developer of pocket file manager