Hi, On Wed, Apr 27, 2022 at 1:50 PM Aleksander Morgado <aleksan...@aleksander.es> wrote: > > I can boot up Windows and downgrade the firmware, but would be > > interested in a more permanent fix. > > > > What would be needed to figure out the new unlock procedure? Any hints > > are much appreciated! > > Lenovo published already their own FCC unlock tool here > https://snapcraft.io/lenovo-wwan-dpr > Haven't tried it yet here though, I'm still using the old SDX55 firmware. > > If you don't want to use that closed source tool and If you're > interested in reverse engineering the process, looking at what that > tool does would be useful I guess.
IIRC the snap does not support the modem running in an X1E4 that I own and Iam not sure wthere it implements the old or the new FCC unlock. I decompiled them some time last year and will have another look later today. A first look at the Windows drivers using Ghidra didn't reveal any FCC unlocking functionality, but frankly I am somewhat lost where to start searching (the Windows drivers are a somewhat bloated set of .sys files / DLLs). Thanks, Thilo
