more working nixpackage for unlocking cellular modem on nixos

configuration.nix

  networking.networkmanager.fccUnlockScripts = [
    {id = "8086:7560"; path = "${pkgs.lenovo-wwan-unlock}/bin/fcc_unlock.sh";}
  ];

documentation

Sometimes modemmanager times out while running the unlock script and I have to run it manually with:

sudo /etc/ModemManager/fcc-unlock.d/8086\:7560 whatever wwan0 wwan0at0 wwan0at1 wwam0mbim0

which seems to work

easy-lenovo-wwan-unlock.nix

{ stdenvNoCC, fetchurl, lib }:
stdenvNoCC.mkDerivation rec {

      #name = "lenovo-wwan-unlock-${version}";
      pname = "lenovo-wwan-unlock-easy";
      version = "2.0.0";
      
      src = ./wwan-unlock.sh;

      # I like to keep the file locally in my repo, but you can also download it from here
      # this PR, specifically: https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/merge_requests/1141/diffs?commit_id=2734ac25191264e6d786af8a9577fb51519cb846
      
      
      /*src = fetchurl {
        url = "https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/raw/2734ac25191264e6d786af8a9577fb51519cb846/data/dispatcher-fcc-unlock/8086";
        hash = "sha256-QuAC2a0renRZQsZvWfTEE9a/Pj6G+ZhGEmYtVagaurE=";
      };*/

      dontUnpack = true;

      installPhase = ''
        runHook preInstall

        mkdir -p $out/bin/
        cp -v $src $out/bin/fcc_unlock.sh
        chmod +x $out/bin/fcc_unlock.sh
        patchShebangs $out/bin/fcc_unlock.sh

        runHook postInstall
      '';


      meta = with lib; {
        homepage = "https://gist.github.com/BohdanTkachenko/3f852c352cb2e02cdcbb47419e2fcc74";
        description = "Easy unlock for Lenovo PC wwan.";
        license = licenses.cc0;
        platforms = platforms.linux;
        maintainers = [ "The Internet's Beloved Princess Grace" ];
      };
  }

flake.nix

   # add the package to nixpkgs in an overlay   
      
      modules = [

        ({ config, pkgs, ... }: { nixpkgs.overlays = 
        [ 
          (self: super: { 
            lenovo-wwan-unlock = super.callPackage ./easy-lenovo-wwan-unlock.nix { };
            }
          )
        ]
        

Annoying. Mine looks like it's using the iosm kernel module if that helps.

My relevant devices are (according to mmcli): wwan0 (net), wwan0at0 (at), wwan0at1 (at), wwan0mbim0 (mbim), no qmi or cdc that I know of.

After messing with these kernel modules for days, I decided to open up the laptop and confirm which modem model # was even in here. You should have seen my face when I noticed the M.2 slot was empty 😂 🤦

Who sells a new laptop SKU with "... 5G" in the title, a nano SIM slot in the side of the chassis, but then doesn't include the modem?! Haha

Oh well, mystery solved for now at least. Thanks!

Oh, yep, that'd do it. Best of luck!

i have a T14s Gen 1 with an L860-GL (FRU 01AX796). is this a solution for that modem? if yes how can i use it? i'm using ubuntu 24.04.

Thank you for this.
Using it on Lenovo T14s Gen 4 with L860-GL (Intel XMM7560) in Hong Kong. Managed to get running under NixOS with the package overlay. I also download as suggested the unlock script from the gist https://gist.github.com/BohdanTkachenko/3f852c352cb2e02cdcbb47419e2fcc74 directly as suggested on the package derivation.
Still have issue with first boots the ModemManager systemd service is not auto-started and NetworkManager doesn't show the MobileBroadband, but i guess that is down to the other issue, as before the fcc-unlock apply script this was also happening.
Tested with 4G sim card and works fine. Didn't pursue very far with the other routes with using the Lenovo binary, after discovering this. Thank you for this.

Thank you for this. Using it on Lenovo T14s Gen 4 with L860-GL (Intel XMM7560) in Hong Kong. Managed to get running under NixOS with the package overlay. I also download as suggested the unlock script from the gist https://gist.github.com/BohdanTkachenko/3f852c352cb2e02cdcbb47419e2fcc74 directly as suggested on the package derivation. Still have issue with first boots the ModemManager systemd service is not auto-started and NetworkManager doesn't show the MobileBroadband, but i guess that is down to the other issue, as before the fcc-unlock apply script this was also happening. Tested with 4G sim card and works fine. Didn't pursue very far with the other routes with using the Lenovo binary, after discovering this. Thank you for this.

Yeah, I find myself having to run mmcli -m any --simple-connect="apn=whatever,someothernonsense" to get networkmanager to get into gear, but it works fine after that. Happy to help!

i have a T14s Gen 1 with an L860-GL (FRU 01AX796). is this a solution for that modem? if yes how can i use it? i'm using ubuntu 24.04.

I don't know, I don't have access to that modem. The instructions from https://gist.github.com/BohdanTkachenko/3f852c352cb2e02cdcbb47419e2fcc74 might help. You'll want to replace the PCI ID with the one for your modem- run lspci -nn and note the pair of numbers in square brackets after your modem. It's 8086:7560 for my modem, yours may vary. You'll want to make sure the file you put in /etc/ModemManager/fcc-unlock.d/ is named after your device's PCI ID. May or may not work, I'm just offering shots in the dark over the internet.