Hi guys,
I have similar problem: I updated my 920 to Windows Phone 10 but I must downgrade to 8.1 because the SIM access doesn't work.
I used Windows Phone Recovery Tool (on Windows 10) but it stopped on firmware updated process.
My phone are bricked (I see only a black screen and 'QHSUSB_DLOAD' device if I connected).
Have you similar problems?
Is Nokia Care Suite the solution for this issue?
Regards,
Gabor
Can't install Nokia Care suite. Any ideas?