diff --git a/integration_test/support/shot_services.dart b/integration_test/support/shot_services.dart
index 1a53bf2..dddd5ec 100644
--- a/integration_test/support/shot_services.dart
+++ b/integration_test/support/shot_services.dart
@@ -31,6 +31,7 @@ PlatformServices shotServices() {
     clock: r.clock,
     vault: r.vault,
     privileged: r.privileged,
+    isMetered: r.isMetered,
     updater: r.updater,
     usage: r.usage == null ? null : const FixedUsage(),
     models: r.models,
diff --git a/lib/core/lan_scan.dart b/lib/core/lan_scan.dart
index d4c4604..a955bca 100644
--- a/lib/core/lan_scan.dart
+++ b/lib/core/lan_scan.dart
@@ -41,10 +41,8 @@ Future<Map<String, String>?> _androidNetKinds() async {
 }
 
 /// X-plore 비교 5-1 ② (관리자 지시 10/21): 지금 쓰는 망이 데이터 요금제인지 (모바일 데이터 · 요금제 Wi-Fi). Android 만 묻고,
-/// 그 밖 (PC) 은 false. 물을 수 없으면 true (받지 않는 쪽으로). 시험에서 바꾼다
-Future<bool> Function() activeMeteredOf = _androidMetered;
-
-Future<bool> _androidMetered() async {
+/// 그 밖 (PC) 은 false. 물을 수 없으면 true (받지 않는 쪽으로). 앱은 PlatformServices.isMetered 로 부른다 (설계 M3 ThumbPolicy - 시험은 그것을 바꿈)
+Future<bool> deviceMetered() async {
   if (!Platform.isAndroid) return false;
   try {
     return await const MethodChannel('jj_mkvmaker/android').invokeMethod<bool>('activeMetered') ?? true;
diff --git a/lib/services/platform_services.dart b/lib/services/platform_services.dart
index 3fde222..3230dbb 100644
--- a/lib/services/platform_services.dart
+++ b/lib/services/platform_services.dart
@@ -9,7 +9,7 @@ import '../app/settings.dart';
 import '../app/vault_location.dart';
 import '../core/shizuku.dart' show PrivilegedFs;
 import '../core/download_detect.dart';
-import '../core/lan_scan.dart' show LanHost;
+import '../core/lan_scan.dart' show LanHost, deviceMetered;
 import '../platform/common/nllb_translator.dart';
 import '../platform/common/opensubtitles_provider.dart';
 import '../platform/common/whisper_recognizer.dart';
@@ -88,6 +88,9 @@ class PlatformServices {
   /// 없으면 PrivilegedFs.current 를 그대로 둔다 (시험이 건 가짜를 덮지 않게)
   final PrivilegedFs? privileged;
 
+  /// 지금 쓰는 망이 데이터 요금제인지 (원격 썸네일 "Wi-Fi 에서만" - 설계 M3 ThumbPolicy). 처음 값 = 실제 (Android 만 묻고 PC 는 false)
+  final Future<bool> Function() isMetered;
+
   /// 이 기기 (Android · Windows · 메모리) - 기기마다 다르게 도는 곳은 이것을 본다 (M1, 처음 값 = 이 기기)
   final PlatformInfo platform;
 
@@ -114,8 +117,10 @@ class PlatformServices {
     PlatformInfo? platform,
     VaultLocation? vault,
     this.privileged,
+    Future<bool> Function()? isMetered,
   })  : models = models ?? ModelStore(),
         vault = vault ?? VaultLocation.under(storage.tempDirectory),
+        isMetered = isMetered ?? deviceMetered,
         platform = platform ?? PlatformInfo.host,
         shell = shell ?? NoopShell();
 
diff --git a/lib/ui/remote_thumb_view.dart b/lib/ui/remote_thumb_view.dart
index 5f35843..dcae562 100644
--- a/lib/ui/remote_thumb_view.dart
+++ b/lib/ui/remote_thumb_view.dart
@@ -6,7 +6,6 @@ import 'package:path/path.dart' as p;
 
 import '../app/app_controller.dart';
 import '../core/file_ops.dart' show FileEntry;
-import '../core/lan_scan.dart' show activeMeteredOf;
 import '../core/playlist.dart' show isVideoFile;
 import '../core/remote_stream.dart';
 import '../core/remote_thumbs.dart';
@@ -83,7 +82,7 @@ Future<bool> remoteThumbsAllowedNow(AppController c) async {
   }
   final now = DateTime.now();
   if (_meteredAt == null || now.difference(_meteredAt!) > const Duration(seconds: 10)) {
-    _metered = await activeMeteredOf();
+    _metered = await c.services.isMetered();
     _meteredAt = now;
   }
   return !_metered;
diff --git a/test/remote_thumbs_test.dart b/test/remote_thumbs_test.dart
index 6366e18..639d819 100644
--- a/test/remote_thumbs_test.dart
+++ b/test/remote_thumbs_test.dart
@@ -5,7 +5,6 @@ import 'package:flutter_test/flutter_test.dart';
 import 'package:jj_mkvmaker/app/app_controller.dart';
 import 'package:jj_mkvmaker/app/settings.dart';
 import 'package:jj_mkvmaker/core/file_ops.dart' show FileEntry;
-import 'package:jj_mkvmaker/core/lan_scan.dart' show activeMeteredOf;
 import 'package:jj_mkvmaker/core/models.dart';
 import 'package:jj_mkvmaker/core/remote_stream.dart';
 import 'package:jj_mkvmaker/core/remote_thumbs.dart';
@@ -126,24 +125,23 @@ void main() {
   });
 
   group('받아도 되는 망 (remoteThumbsAllowedNow)', () {
-    final was = activeMeteredOf;
-    tearDown(() {
-      activeMeteredOf = was;
-      forgetRemoteThumbNet();
-    });
-    AppController ctl() => AppController(PlatformServices(mediaTool: ProcessMediaTool('x', 'y'), storage: DesktopStorageService()));
+    // 설계 M3 ThumbPolicy: 망 판단은 PlatformServices.isMetered 로 넘긴다 (예전 전역 함수 activeMeteredOf)
+    var metered = true;
+    tearDown(forgetRemoteThumbNet);
+    AppController ctl() => AppController(
+        PlatformServices(mediaTool: ProcessMediaTool('x', 'y'), storage: DesktopStorageService(), isMetered: () async => metered));
     test('Wi-Fi 에서만 (처음 값): 데이터 요금제 망이면 아니오 · 아니면 예 · 끔 · 늘', () async {
       final c = ctl();
-      activeMeteredOf = () async => true;
+      metered = true;
       forgetRemoteThumbNet();
       expect(await remoteThumbsAllowedNow(c), isFalse, reason: '모바일 데이터 (VPN 이어도 그 아래가 모바일 데이터)');
-      activeMeteredOf = () async => false;
+      metered = false;
       forgetRemoteThumbNet();
       expect(await remoteThumbsAllowedNow(c), isTrue, reason: 'Wi-Fi (집 Wi-Fi 위의 Tailscale 포함)');
       c.settings.explorer.remoteThumbs = 'off';
       expect(await remoteThumbsAllowedNow(c), isFalse);
       c.settings.explorer.remoteThumbs = 'always';
-      activeMeteredOf = () async => true;
+      metered = true;
       forgetRemoteThumbNet();
       expect(await remoteThumbsAllowedNow(c), isTrue);
     });