diff --git a/hosts/by-name/moby/default.nix b/hosts/by-name/moby/default.nix
index 12ab3062..a4124997 100644
--- a/hosts/by-name/moby/default.nix
+++ b/hosts/by-name/moby/default.nix
@@ -37,6 +37,7 @@
   ];
 
   sane.gui.sxmo.enable = true;
+  sane.services.eg25-manager.enable = true;
   sane.programs.guiApps.suggestedPrograms = [ "handheldGuiApps" ];
   # sane.programs.consoleUtils.enableFor.user.colin = false;
   # sane.programs.guiApps.enableFor.user.colin = false;
diff --git a/modules/services/default.nix b/modules/services/default.nix
index 23b85b75..31bd23d8 100644
--- a/modules/services/default.nix
+++ b/modules/services/default.nix
@@ -2,6 +2,7 @@
 {
   imports = [
     ./dyn-dns.nix
+    ./eg25-manager.nix
     ./kiwix-serve.nix
     ./mautrix-signal.nix
     ./nixserve.nix
diff --git a/modules/services/eg25-manager.nix b/modules/services/eg25-manager.nix
new file mode 100644
index 00000000..b7202d0d
--- /dev/null
+++ b/modules/services/eg25-manager.nix
@@ -0,0 +1,19 @@
+# eg25-manager: <https://gitlab.com/mobian1/eg25-manager>
+# - used by sxmo, in <configs/default_hooks/sxmo_hook_restart_modem_daemons.sh>
+# - requires modemmanager (ModemManager.service)
+{ config, lib, pkgs, ... }:
+let
+  cfg = config.sane.services.eg25-manager;
+in
+{
+  options.sane.services.eg25-manager = {
+    enable = lib.mkEnableOption "Quectel EG25 modem manager service";
+  };
+  config = lib.mkIf cfg.enable {
+    # eg25-manager package ships udev rules *and* a systemd service.
+    # for that reason, i think it needs to be on the system path for the systemd service to be enabled.
+    systemd.packages = [ pkgs.eg25-manager ];
+    services.udev.packages = [ pkgs.eg25-manager ];
+    systemd.services.eg25-manager.wantedBy = [ "multi-user.target" ];
+  };
+}