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 { };
            }
          )
        ]
        

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.