diff --git a/pkgs/default.nix b/pkgs/default.nix
index 9af4ce42..cdab1257 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -112,6 +112,8 @@ let
     # jackett doesn't allow customization of the bind address: this will probably always be here.
     jackett = callPackage ./patched/jackett { inherit (unpatched) jackett; };
 
+    modemmanager = callPackage ./patched/modemmanager { inherit (unpatched) modemmanager; };
+
     phoc = callPackage ./patched/phoc { inherit (unpatched) phoc; };
 
 
diff --git a/pkgs/patched/modemmanager/default.nix b/pkgs/patched/modemmanager/default.nix
new file mode 100644
index 00000000..f0eab19a
--- /dev/null
+++ b/pkgs/patched/modemmanager/default.nix
@@ -0,0 +1,6 @@
+{ modemmanager }: modemmanager.overrideAttrs (upstream: {
+  patches = (upstream.patches or []) ++ [
+    # don't go into the "fail" state just because we can't figure out if the SIM is unlocked
+    ./missing-sim-not-fatal.patch
+  ];
+})
diff --git a/pkgs/patched/modemmanager/missing-sim-not-fatal.patch b/pkgs/patched/modemmanager/missing-sim-not-fatal.patch
new file mode 100644
index 00000000..1b332b15
--- /dev/null
+++ b/pkgs/patched/modemmanager/missing-sim-not-fatal.patch
@@ -0,0 +1,41 @@
+commit bf4b81671e9bd073efc95a2fa4d4c05c3174104f
+Author: Colin <colin@uninsane.org>
+Date:   2023-08-17 07:50:32 +0000
+
+    don't enter failed state due to missing sim
+
+diff --git a/src/mm-iface-modem.c b/src/mm-iface-modem.c
+index 911c139d..c6550ccd 100644
+--- a/src/mm-iface-modem.c
++++ b/src/mm-iface-modem.c
+@@ -3773,7 +3773,8 @@ internal_load_unlock_required_ready (MMIfaceModem *self,
+         } else {
+             mm_obj_dbg (self, "couldn't check if unlock required: %s", error->message);
+             g_error_free (error);
+-            ctx->lock = MM_MODEM_LOCK_UNKNOWN;
++            mm_obj_info(self, "faking unlock state (Colin patch)");
++            ctx->lock = MM_MODEM_LOCK_NONE;
+         }
+     }
+ 
+@@ -5177,13 +5178,13 @@ modem_update_lock_info_ready (MMIfaceModem *self,
+     /* NOTE: we already propagated the lock state, no need to do it again */
+     mm_iface_modem_update_lock_info_finish (self, res, &ctx->fatal_error);
+     if (ctx->fatal_error) {
+-        g_prefix_error (&ctx->fatal_error,
+-                        "Couldn't check unlock status: ");
+-        /* Jump to the last step */
+-        ctx->step = INITIALIZATION_STEP_LAST;
+-    } else
+-        /* Go on to next step */
+-        ctx->step++;
++        mm_obj_info (self, "ignoring 'couldnt check unlock status' error (sane patch)");
++        g_error_free (ctx->fatal_error);
++        ctx->fatal_error = NULL;
++    }
++
++    /* Go on to next step */
++    ctx->step++;
+ 
+     interface_initialization_step (task);
+ }