diff --git a/lib/roles/device.js b/lib/roles/device.js
index ce357a4d..fd82199f 100644
--- a/lib/roles/device.js
+++ b/lib/roles/device.js
@@ -33,6 +33,7 @@ module.exports = function(options) {
         .dependency(require('./device/plugins/reboot'))
         .dependency(require('./device/plugins/connect'))
         .dependency(require('./device/plugins/account'))
+        .dependency(require('./device/plugins/ringer'))
         .define(function(options, solo) {
           if (process.send) {
             // Only if we have a parent process
diff --git a/lib/roles/device/plugins/ringer.js b/lib/roles/device/plugins/ringer.js
new file mode 100644
index 00000000..3d1fd5a1
--- /dev/null
+++ b/lib/roles/device/plugins/ringer.js
@@ -0,0 +1,35 @@
+var syrup = require('syrup')
+
+var logger = require('../../../util/logger')
+var wire = require('../../../wire')
+var wireutil = require('../../../wire/util')
+
+module.exports = syrup.serial()
+  .dependency(require('./service'))
+  .dependency(require('../support/router'))
+  .dependency(require('../support/push'))
+  .define(function(options, service, router, push) {
+    var log = logger.createLogger('device:plugins:ringer')
+
+    router.on(wire.RingerSetMessage, function(channel, message) {
+      var reply = wireutil.reply(options.serial)
+
+      log.info('Setting ringer mode to mode "%s"', message.mode)
+
+      service.setRingerMode(message.mode)
+        .timeout(30000)
+        .then(function() {
+          push.send([
+            channel
+          , reply.okay()
+          ])
+        })
+        .error(function(err) {
+          log.error('Setting ringer mode failed', err.stack)
+          push.send([
+            channel
+          , reply.fail(err.message)
+          ])
+        })
+    })
+  })
diff --git a/lib/roles/device/plugins/service.js b/lib/roles/device/plugins/service.js
index 72584b97..bd63ce30 100644
--- a/lib/roles/device/plugins/service.js
+++ b/lib/roles/device/plugins/service.js
@@ -505,6 +505,22 @@ module.exports = syrup.serial()
         })
     }
 
+    plugin.setRingerMode = function(mode) {
+      return runServiceCommand(
+          apk.wire.MessageType.SET_RINGER_MODE
+        , new apk.wire.SetRingerModeRequest(
+            mode
+          )
+        )
+        .timeout(10000)
+        .then(function(data) {
+          var response = apk.wire.SetRingerModeResponse.decode(data)
+          if (!response.success) {
+            throw new Error('Unable to set ringer mode')
+          }
+        })
+    }
+
     function runServiceCommand(type, cmd) {
       var resolver = Promise.defer()
       var id = Math.floor(Math.random() * 0xFFFFFF)
diff --git a/lib/roles/device/resources/service.js b/lib/roles/device/resources/service.js
index b9b38e7b..72b3c7be 100644
--- a/lib/roles/device/resources/service.js
+++ b/lib/roles/device/resources/service.js
@@ -15,7 +15,7 @@ module.exports = syrup.serial()
     var log = logger.createLogger('device:resources:service')
 
     var resource = {
-      requiredVersion: '0.7.8'
+      requiredVersion: '0.7.10'
     , pkg: 'jp.co.cyberagent.stf'
     , main: 'jp.co.cyberagent.stf.Agent'
     , apk: pathutil.vendor('STFService/STFService.apk')
diff --git a/lib/roles/websocket.js b/lib/roles/websocket.js
index cfe0a698..49a64e30 100644
--- a/lib/roles/websocket.js
+++ b/lib/roles/websocket.js
@@ -331,6 +331,16 @@ module.exports = function(options) {
             )
           ])
         })
+        .on('ringer.set', function(channel, responseChannel, data) {
+          joinChannel(responseChannel)
+          push.send([
+            channel
+          , wireutil.transaction(
+              responseChannel
+            , new wire.RingerSetMessage(data.mode)
+            )
+          ])
+        })
         .on('group.invite', function(channel, responseChannel, data) {
           joinChannel(responseChannel)
           push.send([
diff --git a/lib/wire/wire.proto b/lib/wire/wire.proto
index 68d90177..e1a344ea 100644
--- a/lib/wire/wire.proto
+++ b/lib/wire/wire.proto
@@ -55,6 +55,7 @@ enum MessageType {
   ConnectStartMessage        = 53;
   ConnectStopMessage         = 54;
   AccountRemoveMessage       = 55;
+  RingerSetMessage           = 56;
 }
 
 message Envelope {
@@ -386,6 +387,10 @@ message ConnectStopMessage {
 message AccountRemoveMessage {
 }
 
+message RingerSetMessage {
+  required int32 mode = 1;
+}
+
 // Events, these must be kept in sync with STFService/wire.proto
 
 message AirplaneModeEvent {
diff --git a/res/app/components/stf/control/control-service.js b/res/app/components/stf/control/control-service.js
index 79222d98..14d7ee7d 100644
--- a/res/app/components/stf/control/control-service.js
+++ b/res/app/components/stf/control/control-service.js
@@ -222,6 +222,12 @@ module.exports = function ControlServiceFactory(
       return sendTwoWay('account.remove')
     }
 
+    this.setRingerMode = function(mode) {
+      return sendTwoWay('ringer.set', {
+        mode: mode
+      })
+    }
+
     window.cc = this
   }
 
diff --git a/vendor/STFService/STFService.apk b/vendor/STFService/STFService.apk
index 9608cb54..1c70699f 100644
Binary files a/vendor/STFService/STFService.apk and b/vendor/STFService/STFService.apk differ
diff --git a/vendor/STFService/wire.proto b/vendor/STFService/wire.proto
index b3bc4eb5..257f85be 100644
--- a/vendor/STFService/wire.proto
+++ b/vendor/STFService/wire.proto
@@ -14,8 +14,9 @@ enum MessageType {
     GET_VERSION = 8;
     SET_CLIPBOARD = 9;
     SET_KEYGUARD_STATE = 10;
-    SET_WAKE_LOCK = 11;
+    SET_RINGER_MODE = 21;
     SET_ROTATION = 12;
+    SET_WAKE_LOCK = 11;
     EVENT_AIRPLANE_MODE = 13;
     EVENT_BATTERY = 14;
     EVENT_CONNECTIVITY = 15;
@@ -180,6 +181,20 @@ message RemoveAccountResponse {
     required bool success = 1;
 }
 
+enum RingerMode {
+    SILENT = 0;
+    VIBRATE = 1;
+    NORMAL = 2;
+}
+
+message SetRingerModeRequest {
+    required RingerMode mode = 1;
+}
+
+message SetRingerModeResponse {
+    required bool success = 1;
+}
+
 // Agent
 
 enum KeyEvent {