Good news ! The 3.1.0.12 version works fine for me, I have no longer sound issue, and camera is working. I misread the instruction of post #490, copy/paste links from post #464 and just change the version, I didn't pay attention that it was sailfishos_3.1.0.12_latest/ and not sailfishos_3.1.0.12_latest_armv7hl/ So, can't work, obviously. My bad ... Enjoy your 3.1.0.12 !