diff --git a/app/src/main/java/com/hippo/ehviewer/Settings.java b/app/src/main/java/com/hippo/ehviewer/Settings.java
index 89be8bd14..e6edaf61e 100644
--- a/app/src/main/java/com/hippo/ehviewer/Settings.java
+++ b/app/src/main/java/com/hippo/ehviewer/Settings.java
@@ -412,6 +412,13 @@ public class Settings {
         putString(KEY_HATH_PASSKEY, value);
     }
 
+    private static final String KEY_CELLULAR_NETWORK_WARNING = "cellular_network_warning";
+    private static final boolean DEFAULT_CELLULAR_NETWORK_WARNING = false;
+
+    public static boolean getCellularNetworkWarning() {
+        return getBoolean(KEY_CELLULAR_NETWORK_WARNING, DEFAULT_CELLULAR_NETWORK_WARNING);
+    }
+
     /********************
      ****** Read
      ********************/
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/MainActivity.java b/app/src/main/java/com/hippo/ehviewer/ui/MainActivity.java
index b31b8ffd4..91e1a982d 100644
--- a/app/src/main/java/com/hippo/ehviewer/ui/MainActivity.java
+++ b/app/src/main/java/com/hippo/ehviewer/ui/MainActivity.java
@@ -20,6 +20,7 @@ import android.Manifest;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.graphics.Bitmap;
+import android.net.ConnectivityManager;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
@@ -70,6 +71,7 @@ import com.hippo.ehviewer.ui.scene.WarningScene;
 import com.hippo.ehviewer.ui.scene.WebViewSignInScene;
 import com.hippo.ehviewer.widget.EhDrawerLayout;
 import com.hippo.io.UniFileInputStreamPipe;
+import com.hippo.network.Network;
 import com.hippo.scene.Announcer;
 import com.hippo.scene.SceneFragment;
 import com.hippo.scene.StageActivity;
@@ -392,6 +394,9 @@ public final class MainActivity extends StageActivity
             onInit();
             CommonOperations.checkUpdate(this, false);
             checkDownloadLocation();
+            if (Settings.getCellularNetworkWarning()) {
+                checkCellularNetwork();
+            }
         } else {
             onRestore(savedInstanceState);
         }
@@ -410,6 +415,12 @@ public final class MainActivity extends StageActivity
                 .show();
     }
 
+    private void checkCellularNetwork() {
+        if (Network.getActiveNetworkType(this) == ConnectivityManager.TYPE_MOBILE) {
+            showTip(R.string.cellular_network_warning, BaseScene.LENGTH_SHORT);
+        }
+    }
+
     private void onInit() {
         // Check permission
         PermissionRequester.request(this, Manifest.permission.WRITE_EXTERNAL_STORAGE,
diff --git a/app/src/main/java/com/hippo/network/Network.java b/app/src/main/java/com/hippo/network/Network.java
new file mode 100644
index 000000000..b00c10d95
--- /dev/null
+++ b/app/src/main/java/com/hippo/network/Network.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2014 Hippo Seven
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.hippo.network;
+
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
+
+public final class Network {
+    private Network() {}
+
+    public static int getActiveNetworkType(Context context) {
+        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
+        NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
+        if (activeNetwork != null) {
+            return activeNetwork.getType();
+        } else {
+            return -1;
+        }
+    }
+}
diff --git a/app/src/main/res/values-zh-rCN/strings.xml b/app/src/main/res/values-zh-rCN/strings.xml
index 9f8a608fc..247bf1c27 100644
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@@ -50,6 +50,8 @@
 
     <string name="invalid_download_location">似乎下载路径不可用。请到重新设置下载路径。</string>
 
+    <string name="cellular_network_warning">正在使用移动网络</string>
+
     <string name="error_bad_status_code">错误的状态码：%d</string>
     <string name="error_timeout">超时</string>
     <string name="error_unknown_host">未知主机</string>
@@ -385,6 +387,7 @@
     <string name="settings_eh_show_jpn_title_summary_off">显示默认标题。一般是英文标题</string>
     <string name="settings_eh_filter">过滤</string>
     <string name="settings_eh_filter_summary">过滤标题，上传者，标签和标签组</string>
+    <string name="settings_eh_cellular_network_warning">移动网络警告</string>
 
     <string name="settings_read">阅读</string>
     <string name="settings_read_screen_rotation">屏幕方向</string>
diff --git a/app/src/main/res/values-zh-rHK/strings.xml b/app/src/main/res/values-zh-rHK/strings.xml
index 05d773f5c..5821cc4bf 100644
--- a/app/src/main/res/values-zh-rHK/strings.xml
+++ b/app/src/main/res/values-zh-rHK/strings.xml
@@ -385,6 +385,7 @@
     <string name="settings_eh_show_jpn_title_summary_off">顯示默認標題。一般是英文標題</string>
     <string name="settings_eh_filter">過濾</string>
     <string name="settings_eh_filter_summary">過濾標題，上傳者，標籤和標籤組</string>
+    <string name="settings_eh_cellular_network_warning">移動網絡警告</string>
 
     <string name="settings_read">閲讀</string>
     <string name="settings_read_screen_rotation">屏幕方向</string>
diff --git a/app/src/main/res/values-zh-rTW/strings.xml b/app/src/main/res/values-zh-rTW/strings.xml
index 51aed953f..94b2c1966 100644
--- a/app/src/main/res/values-zh-rTW/strings.xml
+++ b/app/src/main/res/values-zh-rTW/strings.xml
@@ -385,6 +385,7 @@
     <string name="settings_eh_show_jpn_title_summary_off">顯示預設標題。一般是英文標題</string>
     <string name="settings_eh_filter">過濾</string>
     <string name="settings_eh_filter_summary">過濾標題，上傳者，標籤和標籤組</string>
+    <string name="settings_eh_cellular_network_warning">行動網路警告</string>
 
     <string name="settings_read">閱讀</string>
     <string name="settings_read_screen_rotation">螢幕方向</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 5b331fbeb..9c71ef707 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -66,6 +66,8 @@
 
     <string name="invalid_download_location">It seems download location is not available. Please set it in Settings.</string>
 
+    <string name="cellular_network_warning">Connected to cellular networks</string>
+
     <string name="error_status_code_400" translatable="false">Bad Request</string>
     <string name="error_status_code_401" translatable="false">Unauthorized</string>
     <string name="error_status_code_402" translatable="false">Payment Required</string>
@@ -427,6 +429,7 @@
     <string name="settings_eh_show_jpn_title_summary_off">Show default title. It is usually English title</string>
     <string name="settings_eh_filter">Filter</string>
     <string name="settings_eh_filter_summary">Filter by title, uploader, tag and tag namespace</string>
+    <string name="settings_eh_cellular_network_warning">Cellular network warning</string>
 
     <string name="settings_read">Read</string>
     <string name="settings_read_screen_rotation">Screen orientation</string>
diff --git a/app/src/main/res/xml/eh_settings.xml b/app/src/main/res/xml/eh_settings.xml
index 5f9bcd2da..c634dbbc1 100644
--- a/app/src/main/res/xml/eh_settings.xml
+++ b/app/src/main/res/xml/eh_settings.xml
@@ -97,4 +97,9 @@
         android:summary="@string/settings_eh_filter_summary"
         app:activity="com.hippo.ehviewer.ui.FilterActivity"/>
 
+    <com.hippo.preference.SwitchPreference
+        android:key="cellular_network_warning"
+        android:title="@string/settings_eh_cellular_network_warning"
+        android:defaultValue="false"/>
+
 </PreferenceScreen>