diff --git a/daemon/src/main.rs b/daemon/src/main.rs
index 8ebb37c..429797a 100644
--- a/daemon/src/main.rs
+++ b/daemon/src/main.rs
@@ -25,7 +25,7 @@ use crate::server::{
     ServerState, debug_set_display_state, get_config, get_qmdl, get_zip, serve_static, set_config,
     test_notification,
 };
-use crate::stats::{get_qmdl_manifest, get_system_stats};
+use crate::stats::{get_qmdl_manifest, get_route_status, get_system_stats};
 
 use analysis::{
     AnalysisCtrlMessage, AnalysisStatus, get_analysis_status, run_analysis_thread, start_analysis,
@@ -58,6 +58,7 @@ fn get_router() -> AppRouter {
         .route("/api/qmdl/{name}", get(get_qmdl))
         .route("/api/zip/{name}", get(get_zip))
         .route("/api/system-stats", get(get_system_stats))
+        .route("/api/route-status", get(get_route_status))
         .route("/api/qmdl-manifest", get(get_qmdl_manifest))
         .route("/api/log", get(get_log))
         .route("/api/start-recording", post(start_recording))
diff --git a/daemon/src/stats.rs b/daemon/src/stats.rs
index 5f5842c..fd63a02 100644
--- a/daemon/src/stats.rs
+++ b/daemon/src/stats.rs
@@ -174,3 +174,25 @@ pub async fn get_log() -> Result<String, (StatusCode, String)> {
         .await
         .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()))
 }
+
+#[derive(Debug, Serialize)]
+pub struct RouteStatus {
+    pub has_default_route: bool,
+}
+
+pub async fn get_route_status() -> Json<RouteStatus> {
+    let mut cmd = Command::new("busybox");
+    cmd.args(["ip", "route"]);
+
+    let has_default_route = match get_cmd_output(cmd).await {
+        Ok(output) => output.lines().any(|line| line.starts_with("default ")),
+        Err(err) => {
+            log::warn!("Failed to check default route: {err}");
+            // More likely than not, this is a portability issue. The logic hasn't been fully
+            // tested on all devices. We shouldn't scare users unnecessarily.
+            true
+        }
+    };
+
+    Json(RouteStatus { has_default_route })
+}
diff --git a/daemon/web/src/lib/components/ActionErrors.svelte b/daemon/web/src/lib/components/ActionErrors.svelte
index 1c0994d..47a5d6f 100644
--- a/daemon/web/src/lib/components/ActionErrors.svelte
+++ b/daemon/web/src/lib/components/ActionErrors.svelte
@@ -1,5 +1,6 @@
 <script lang="ts">
     import { action_errors } from '../action_errors.svelte';
+    import WarningIcon from './WarningIcon.svelte';
 
     let pos = $state(0);
     let current_error = $derived(action_errors[pos]);
@@ -25,21 +26,7 @@
     >
         <div class="flex flex-row justify-between">
             <span class="text-xl font-bold mb-2 mr-5 flex flex-row items-center gap-1 text-red-600">
-                <svg
-                    class="w-6 h-6 text-red-600"
-                    aria-hidden="true"
-                    xmlns="http://www.w3.org/2000/svg"
-                    width="24"
-                    height="24"
-                    fill="currentColor"
-                    viewBox="0 0 24 24"
-                >
-                    <path
-                        fill-rule="evenodd"
-                        d="M2 12C2 6.477 6.477 2 12 2s10 4.477 10 10-4.477 10-10 10S2 17.523 2 12Zm11-4a1 1 0 1 0-2 0v5a1 1 0 1 0 2 0V8Zm-1 7a1 1 0 1 0 0 2h.01a1 1 0 1 0 0-2H12Z"
-                        clip-rule="evenodd"
-                    />
-                </svg>
+                <WarningIcon class="w-6 h-6 text-red-600" />
                 Error Completing Action {current_error.times > 1 ? `x${current_error.times}` : ''}
             </span>
             <div class="flex items-center mb-2">
diff --git a/daemon/web/src/lib/components/IPRouteAlert.svelte b/daemon/web/src/lib/components/IPRouteAlert.svelte
new file mode 100644
index 0000000..d724cb1
--- /dev/null
+++ b/daemon/web/src/lib/components/IPRouteAlert.svelte
@@ -0,0 +1,52 @@
+<script lang="ts">
+    import { get_route_status } from '$lib/utils.svelte';
+    import WarningIcon from './WarningIcon.svelte';
+
+    let show_alert = $state(false);
+    let check_completed = $state(false);
+
+    async function check_route() {
+        if (check_completed) return;
+
+        try {
+            const status = await get_route_status();
+            if (!status.has_default_route) {
+                show_alert = true;
+            }
+        } catch (err) {
+            console.error('Failed to check route status:', err);
+        }
+        check_completed = true;
+    }
+
+    function dismiss() {
+        show_alert = false;
+    }
+
+    $effect(() => {
+        check_route();
+    });
+</script>
+
+{#if show_alert}
+    <div
+        class="bg-yellow-100 border-yellow-400 drop-shadow p-4 flex flex-col gap-2 border rounded-md"
+    >
+        <span class="text-xl font-bold flex flex-row items-center gap-2 text-yellow-700">
+            <WarningIcon class="w-6 h-6 text-yellow-600" />
+            No Default Route Detected
+        </span>
+        <p>
+            This device didn't get an IP address from the network operator. Presumably the SIM card
+            is not inserted or very old. Try a different SIM card.
+        </p>
+        <div class="flex flex-row gap-2 justify-end">
+            <button
+                class="font-medium py-2 px-4 rounded-md border border-gray-400 hover:bg-yellow-200"
+                onclick={dismiss}
+            >
+                Dismiss
+            </button>
+        </div>
+    </div>
+{/if}
diff --git a/daemon/web/src/lib/components/WarningIcon.svelte b/daemon/web/src/lib/components/WarningIcon.svelte
new file mode 100644
index 0000000..29d60f0
--- /dev/null
+++ b/daemon/web/src/lib/components/WarningIcon.svelte
@@ -0,0 +1,19 @@
+<script lang="ts">
+    let { class: className = 'w-6 h-6' }: { class?: string } = $props();
+</script>
+
+<svg
+    class={className}
+    aria-hidden="true"
+    xmlns="http://www.w3.org/2000/svg"
+    width="24"
+    height="24"
+    fill="currentColor"
+    viewBox="0 0 24 24"
+>
+    <path
+        fill-rule="evenodd"
+        d="M2 12C2 6.477 6.477 2 12 2s10 4.477 10 10-4.477 10-10 10S2 17.523 2 12Zm11-4a1 1 0 1 0-2 0v5a1 1 0 1 0 2 0V8Zm-1 7a1 1 0 1 0 0 2h.01a1 1 0 1 0 0-2H12Z"
+        clip-rule="evenodd"
+    />
+</svg>
diff --git a/daemon/web/src/lib/utils.svelte.ts b/daemon/web/src/lib/utils.svelte.ts
index 36cac1a..e4488f7 100644
--- a/daemon/web/src/lib/utils.svelte.ts
+++ b/daemon/web/src/lib/utils.svelte.ts
@@ -97,3 +97,11 @@ export async function test_notification(): Promise<void> {
         throw new Error(error);
     }
 }
+
+export interface RouteStatus {
+    has_default_route: boolean;
+}
+
+export async function get_route_status(): Promise<RouteStatus> {
+    return JSON.parse(await req('GET', '/api/route-status'));
+}
diff --git a/daemon/web/src/routes/+page.svelte b/daemon/web/src/routes/+page.svelte
index 06d6b06..afea145 100644
--- a/daemon/web/src/routes/+page.svelte
+++ b/daemon/web/src/routes/+page.svelte
@@ -10,7 +10,9 @@
     import RecordingControls from '$lib/components/RecordingControls.svelte';
     import ConfigForm from '$lib/components/ConfigForm.svelte';
     import ActionErrors from '$lib/components/ActionErrors.svelte';
+    import IPRouteAlert from '$lib/components/IPRouteAlert.svelte';
     import LogView from '$lib/components/LogView.svelte';
+    import WarningIcon from '$lib/components/WarningIcon.svelte';
 
     let manager: AnalysisManager = new AnalysisManager();
     let loaded = $state(false);
@@ -156,21 +158,7 @@
             class="bg-red-100 border-red-100 drop-shadow p-4 flex flex-col gap-2 border rounded-md flex-1 justify-between"
         >
             <span class="text-2xl font-bold mb-2 flex flex-row items-center gap-2 text-red-600">
-                <svg
-                    class="w-8 h-8 text-red-600"
-                    aria-hidden="true"
-                    xmlns="http://www.w3.org/2000/svg"
-                    width="24"
-                    height="24"
-                    fill="currentColor"
-                    viewBox="0 0 24 24"
-                >
-                    <path
-                        fill-rule="evenodd"
-                        d="M2 12C2 6.477 6.477 2 12 2s10 4.477 10 10-4.477 10-10 10S2 17.523 2 12Zm11-4a1 1 0 1 0-2 0v5a1 1 0 1 0 2 0V8Zm-1 7a1 1 0 1 0 0 2h.01a1 1 0 1 0 0-2H12Z"
-                        clip-rule="evenodd"
-                    />
-                </svg>
+                <WarningIcon class="w-8 h-8 text-red-600" />
                 Connection Error
             </span>
             <span
@@ -186,6 +174,7 @@
         </div>
     {/if}
     <ActionErrors />
+    <IPRouteAlert />
     {#if loaded}
         <div class="flex flex-col lg:flex-row gap-4">
             {#if current_entry}
@@ -202,21 +191,7 @@
                     <span
                         class="text-2xl font-bold mb-2 flex flex-row items-center gap-2 text-red-600"
                     >
-                        <svg
-                            class="w-8 h-8 text-red-600"
-                            aria-hidden="true"
-                            xmlns="http://www.w3.org/2000/svg"
-                            width="24"
-                            height="24"
-                            fill="currentColor"
-                            viewBox="0 0 24 24"
-                        >
-                            <path
-                                fill-rule="evenodd"
-                                d="M2 12C2 6.477 6.477 2 12 2s10 4.477 10 10-4.477 10-10 10S2 17.523 2 12Zm11-4a1 1 0 1 0-2 0v5a1 1 0 1 0 2 0V8Zm-1 7a1 1 0 1 0 0 2h.01a1 1 0 1 0 0-2H12Z"
-                                clip-rule="evenodd"
-                            />
-                        </svg>
+                        <WarningIcon class="w-8 h-8 text-red-600" />
                         WARNING: Not Running
                     </span>
                     <span>
diff --git a/daemon/web/vite.config.ts b/daemon/web/vite.config.ts
index 9720c43..c10a3cf 100644
--- a/daemon/web/vite.config.ts
+++ b/daemon/web/vite.config.ts
@@ -5,7 +5,7 @@ export default defineConfig({
     server: {
         proxy: {
             '/api': {
-                target: 'http://localhost:8080',
+                target: process.env.API_TARGET || 'http://localhost:8080',
                 changeOrigin: true,
                 secure: false,
                 configure: (proxy, _options) => {