diff --git a/core/backends/lan/compositeuploadjob.cpp b/core/backends/lan/compositeuploadjob.cpp
index 76311688d..62044b20e 100644
--- a/core/backends/lan/compositeuploadjob.cpp
+++ b/core/backends/lan/compositeuploadjob.cpp
@@ -146,10 +146,8 @@ void CompositeUploadJob::socketDisconnected()
     m_socket->close();
 }
 
-void CompositeUploadJob::socketError(QAbstractSocket::SocketError error)
+void CompositeUploadJob::socketError()
 {
-    Q_UNUSED(error);
-
     // Do not close the socket because when android closes the socket (share is cancelled) closing the socket leads to a cyclic socketError and eventually a
     // segv
     setError(SocketError);
@@ -158,10 +156,8 @@ void CompositeUploadJob::socketError(QAbstractSocket::SocketError error)
     m_running = false;
 }
 
-void CompositeUploadJob::sslError(const QList<QSslError> &errors)
+void CompositeUploadJob::sslError()
 {
-    Q_UNUSED(errors);
-
     m_socket->close();
     setError(SslError);
     emitResult();
@@ -240,10 +236,8 @@ bool CompositeUploadJob::doKill()
     return true;
 }
 
-void CompositeUploadJob::slotProcessedAmount(KJob *job, KJob::Unit unit, qulonglong amount)
+void CompositeUploadJob::slotProcessedAmount(KJob * /*job*/, KJob::Unit unit, qulonglong amount)
 {
-    Q_UNUSED(job);
-
     m_currentJobSendPayloadSize = amount;
     quint64 uploaded = m_totalSendPayloadSize + m_currentJobSendPayloadSize;
 
diff --git a/core/backends/lan/compositeuploadjob.h b/core/backends/lan/compositeuploadjob.h
index 1bf6810aa..0e066a4c6 100644
--- a/core/backends/lan/compositeuploadjob.h
+++ b/core/backends/lan/compositeuploadjob.h
@@ -55,8 +55,8 @@ private:
 private Q_SLOTS:
     void newConnection();
     void socketDisconnected();
-    void socketError(QAbstractSocket::SocketError socketError);
-    void sslError(const QList<QSslError> &errors);
+    void socketError();
+    void sslError();
     void encrypted();
     void slotProcessedAmount(KJob *job, KJob::Unit unit, qulonglong amount);
     void slotResult(KJob *job) override;
diff --git a/core/backends/lan/uploadjob.cpp b/core/backends/lan/uploadjob.cpp
index d3baf685a..01b826d72 100644
--- a/core/backends/lan/uploadjob.cpp
+++ b/core/backends/lan/uploadjob.cpp
@@ -64,10 +64,8 @@ void UploadJob::uploadNextPacket()
     }
 }
 
-void UploadJob::encryptedBytesWritten(qint64 bytes)
+void UploadJob::encryptedBytesWritten(qint64 /*bytes*/)
 {
-    Q_UNUSED(bytes);
-
     if (m_socket->encryptedBytesToWrite() == 0) {
         bytesUploaded += bytesUploading;
         setProcessedAmount(Bytes, bytesUploaded);
diff --git a/core/compositefiletransferjob.cpp b/core/compositefiletransferjob.cpp
index 64d440ae5..ecb7b9a14 100644
--- a/core/compositefiletransferjob.cpp
+++ b/core/compositefiletransferjob.cpp
@@ -86,10 +86,8 @@ bool CompositeFileTransferJob::doKill()
     return true;
 }
 
-void CompositeFileTransferJob::slotProcessedAmount(KJob *job, KJob::Unit unit, qulonglong amount)
+void CompositeFileTransferJob::slotProcessedAmount(KJob * /*job*/, KJob::Unit unit, qulonglong amount)
 {
-    Q_UNUSED(job);
-
     m_currentJobSentPayloadSize = amount;
     const auto totalSent = m_totalSentPayloadSize + m_currentJobSentPayloadSize;
 
diff --git a/indicator/indicatorhelper.cpp b/indicator/indicatorhelper.cpp
index b32639ede..312c31b16 100644
--- a/indicator/indicatorhelper.cpp
+++ b/indicator/indicatorhelper.cpp
@@ -28,10 +28,8 @@ void IndicatorHelper::iconPathHook()
 {
 }
 
-int IndicatorHelper::daemonHook(QProcess &kdeconnectd)
+int IndicatorHelper::daemonHook(QProcess & /*kdeconnectd*/)
 {
-    Q_UNUSED(kdeconnectd);
-
     return 0;
 }
 
diff --git a/interfaces/devicesmodel.cpp b/interfaces/devicesmodel.cpp
index 5caa78231..88a4ba5d8 100644
--- a/interfaces/devicesmodel.cpp
+++ b/interfaces/devicesmodel.cpp
@@ -94,9 +94,8 @@ void DevicesModel::deviceRemoved(const QString &id)
     }
 }
 
-void DevicesModel::deviceUpdated(const QString &id, bool isVisible)
+void DevicesModel::deviceUpdated(const QString &id)
 {
-    Q_UNUSED(isVisible);
     int row = rowForDevice(id);
 
     if (row < 0) {
@@ -179,17 +178,10 @@ void DevicesModel::receivedDeviceList(QDBusPendingCallWatcher *watcher)
 void DevicesModel::appendDevice(DeviceDbusInterface *dev)
 {
     m_deviceList.append(dev);
-    connect(dev, &OrgKdeKdeconnectDeviceInterface::nameChanged, this, &DevicesModel::nameChanged);
-}
-
-void DevicesModel::nameChanged(const QString &newName)
-{
-    Q_UNUSED(newName);
-    DeviceDbusInterface *device = static_cast<DeviceDbusInterface *>(sender());
-
-    Q_ASSERT(rowForDevice(device->id()) >= 0);
-
-    deviceUpdated(device->id(), true);
+    connect(dev, &OrgKdeKdeconnectDeviceInterface::nameChanged, this, [this, dev]() {
+        Q_ASSERT(rowForDevice(dev->id()) >= 0);
+        deviceUpdated(dev->id());
+    });
 }
 
 void DevicesModel::clearDevices()
diff --git a/interfaces/devicesmodel.h b/interfaces/devicesmodel.h
index e8c08af56..be8168c12 100644
--- a/interfaces/devicesmodel.h
+++ b/interfaces/devicesmodel.h
@@ -61,10 +61,9 @@ public:
 private Q_SLOTS:
     void deviceAdded(const QString &id);
     void deviceRemoved(const QString &id);
-    void deviceUpdated(const QString &id, bool isVisible);
+    void deviceUpdated(const QString &id);
     void refreshDeviceList();
     void receivedDeviceList(QDBusPendingCallWatcher *watcher);
-    void nameChanged(const QString &newName);
 
 Q_SIGNALS:
     void rowsChanged();
diff --git a/plugins/findthisdevice/findthisdeviceplugin.cpp b/plugins/findthisdevice/findthisdeviceplugin.cpp
index 6dba0f009..1db46f828 100644
--- a/plugins/findthisdevice/findthisdeviceplugin.cpp
+++ b/plugins/findthisdevice/findthisdeviceplugin.cpp
@@ -31,10 +31,8 @@ FindThisDevicePlugin::FindThisDevicePlugin(QObject *parent, const QVariantList &
 {
 }
 
-void FindThisDevicePlugin::receivePacket(const NetworkPacket &np)
+void FindThisDevicePlugin::receivePacket(const NetworkPacket & /*np*/)
 {
-    Q_UNUSED(np);
-
     const QString soundFile = config()->getString(QStringLiteral("ringtone"), defaultSound());
     const QUrl soundURL = QUrl::fromLocalFile(soundFile);
 
diff --git a/plugins/lockdevice/lockdeviceplugin.cpp b/plugins/lockdevice/lockdeviceplugin.cpp
index 82fc9afac..0002009dc 100644
--- a/plugins/lockdevice/lockdeviceplugin.cpp
+++ b/plugins/lockdevice/lockdeviceplugin.cpp
@@ -37,9 +37,7 @@ LockDevicePlugin::LockDevicePlugin(QObject *parent, const QVariantList &args)
     connect(&m_propertiesInterface,
             &OrgFreedesktopDBusPropertiesInterface::PropertiesChanged,
             this,
-            [this](const QString &interface, const QVariantMap &properties, QStringList invalidatedProperties) {
-                Q_UNUSED(invalidatedProperties);
-
+            [this](const QString &interface, const QVariantMap &properties) {
                 if (interface != QLatin1String("org.freedesktop.login1.Session")) {
                     return;
                 }
diff --git a/plugins/mmtelephony/mmtelephonyplugin.cpp b/plugins/mmtelephony/mmtelephonyplugin.cpp
index d90fbb7aa..df7e3ae52 100644
--- a/plugins/mmtelephony/mmtelephonyplugin.cpp
+++ b/plugins/mmtelephony/mmtelephonyplugin.cpp
@@ -52,17 +52,12 @@ void MMTelephonyPlugin::onModemAdded(const QString &path)
     });
 }
 
-void MMTelephonyPlugin::onModemRemoved(const QString &path)
-{
-    Q_UNUSED(path);
-}
-
 void MMTelephonyPlugin::onCallAdded(ModemManager::Call::Ptr call)
 {
     qCDebug(KDECONNECT_PLUGIN_MMTELEPHONY) << "Call added" << call->number();
 
-    connect(call.get(), &ModemManager::Call::stateChanged, this, [=](MMCallState newState, MMCallState oldState, MMCallStateReason reason) {
-        onCallStateChanged(call.get(), newState, oldState, reason);
+    connect(call.get(), &ModemManager::Call::stateChanged, this, [=](MMCallState newState, MMCallState oldState) {
+        onCallStateChanged(call.get(), newState, oldState);
     });
 }
 
@@ -91,9 +86,8 @@ QString MMTelephonyPlugin::stateName(MMCallState state)
     return event;
 }
 
-void MMTelephonyPlugin::onCallStateChanged(ModemManager::Call *call, MMCallState newState, MMCallState oldState, MMCallStateReason reason)
+void MMTelephonyPlugin::onCallStateChanged(ModemManager::Call *call, MMCallState newState, MMCallState oldState)
 {
-    Q_UNUSED(reason);
     auto event = stateName(newState);
 
     qCDebug(KDECONNECT_PLUGIN_MMTELEPHONY) << "Call state changed" << call->uni() << event;
diff --git a/plugins/mmtelephony/mmtelephonyplugin.h b/plugins/mmtelephony/mmtelephonyplugin.h
index 610b7f790..3d9e5a21c 100644
--- a/plugins/mmtelephony/mmtelephonyplugin.h
+++ b/plugins/mmtelephony/mmtelephonyplugin.h
@@ -42,8 +42,7 @@ private:
     void onCallAdded(ModemManager::Call::Ptr call);
     void onCallRemoved(ModemManager::Call::Ptr call);
     void onModemAdded(const QString &path);
-    void onModemRemoved(const QString &path);
-    void onCallStateChanged(ModemManager::Call *call, MMCallState newState, MMCallState oldState, MMCallStateReason reason);
+    void onCallStateChanged(ModemManager::Call *call, MMCallState newState, MMCallState oldState);
     void sendMMTelephonyPacket(ModemManager::Call *call, const QString &state);
     void sendCancelMMTelephonyPacket(ModemManager::Call *call, const QString &lastState);
     static QString stateName(MMCallState state);
diff --git a/plugins/mpriscontrol/mpriscontrolplugin.cpp b/plugins/mpriscontrol/mpriscontrolplugin.cpp
index c58851a1b..5519f20cd 100644
--- a/plugins/mpriscontrol/mpriscontrolplugin.cpp
+++ b/plugins/mpriscontrol/mpriscontrolplugin.cpp
@@ -119,10 +119,8 @@ void MprisControlPlugin::seeked(qlonglong position)
     sendPacket(np);
 }
 
-void MprisControlPlugin::propertiesChanged(const QString &propertyInterface, const QVariantMap &properties)
+void MprisControlPlugin::propertiesChanged(const QString & /*propertyInterface*/, const QVariantMap &properties)
 {
-    Q_UNUSED(propertyInterface);
-
     OrgFreedesktopDBusPropertiesInterface *propertiesInterface = (OrgFreedesktopDBusPropertiesInterface *)sender();
     const auto end = playerList.constEnd();
     const auto it = std::find_if(playerList.constBegin(), end, [propertiesInterface](const MprisPlayer &player) {
diff --git a/plugins/mprisremote/mprisremoteplayermediaplayer2player.cpp b/plugins/mprisremote/mprisremoteplayermediaplayer2player.cpp
index ae923cddd..5c4971d64 100644
--- a/plugins/mprisremote/mprisremoteplayermediaplayer2player.cpp
+++ b/plugins/mprisremote/mprisremoteplayermediaplayer2player.cpp
@@ -159,17 +159,14 @@ void MprisRemotePlayerMediaPlayer2Player::Seek(qlonglong Offset)
     m_plugin->seek(Offset);
 }
 
-void MprisRemotePlayerMediaPlayer2Player::SetPosition(QDBusObjectPath TrackId, qlonglong Position)
+void MprisRemotePlayerMediaPlayer2Player::SetPosition(QDBusObjectPath /*TrackId*/, qlonglong Position)
 {
-    Q_UNUSED(TrackId)
-
     m_plugin->setPlayer(m_parent->identity());
     m_plugin->setPosition(Position / 1000);
 }
 
-void MprisRemotePlayerMediaPlayer2Player::OpenUri(QString Uri)
+void MprisRemotePlayerMediaPlayer2Player::OpenUri(QString /*Uri*/)
 {
-    Q_UNUSED(Uri)
 }
 
 void MprisRemotePlayerMediaPlayer2Player::controlsChanged()
diff --git a/plugins/runcommand/runcommand_config.cpp b/plugins/runcommand/runcommand_config.cpp
index 488572845..7c12c5fd0 100644
--- a/plugins/runcommand/runcommand_config.cpp
+++ b/plugins/runcommand/runcommand_config.cpp
@@ -241,10 +241,9 @@ void RunCommandConfig::insertRow(int i, const QString &name, const QString &comm
     m_entriesModel->insertRow(i, QList<QStandardItem *>() << newName << newCommand);
 }
 
-void RunCommandConfig::onDataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight)
+void RunCommandConfig::onDataChanged(const QModelIndex & /*topLeft*/, const QModelIndex &bottomRight)
 {
     markAsChanged();
-    Q_UNUSED(topLeft);
     if (bottomRight.row() == m_entriesModel->rowCount() - 1) {
         // TODO check both entries are still empty
         insertEmptyRow();
diff --git a/plugins/sendnotifications/notifyingapplicationmodel.cpp b/plugins/sendnotifications/notifyingapplicationmodel.cpp
index 49634cb66..7969f3d01 100644
--- a/plugins/sendnotifications/notifyingapplicationmodel.cpp
+++ b/plugins/sendnotifications/notifyingapplicationmodel.cpp
@@ -73,7 +73,6 @@ void NotifyingApplicationModel::clearApplications()
 
 QVariant NotifyingApplicationModel::data(const QModelIndex &index, int role) const
 {
-    Q_UNUSED(role);
     if (!index.isValid() || index.row() < 0 || index.row() >= m_apps.size() || index.column() > 3) {
         return QVariant();
     }
diff --git a/smsapp/conversationmodel.cpp b/smsapp/conversationmodel.cpp
index c0b4d80ea..9a7a3c714 100644
--- a/smsapp/conversationmodel.cpp
+++ b/smsapp/conversationmodel.cpp
@@ -62,7 +62,7 @@ void ConversationModel::setDeviceId(const QString &deviceId)
                                                << "of" << this;
     if (m_conversationsInterface) {
         disconnect(m_conversationsInterface, SIGNAL(conversationUpdated(QDBusVariant)), this, SLOT(handleConversationUpdate(QDBusVariant)));
-        disconnect(m_conversationsInterface, SIGNAL(conversationLoaded(qint64, quint64)), this, SLOT(handleConversationLoaded(qint64, quint64)));
+        disconnect(m_conversationsInterface, SIGNAL(conversationLoaded(qint64, quint64)), this, SLOT(handleConversationLoaded(qint64)));
         disconnect(m_conversationsInterface, SIGNAL(conversationCreated(QDBusVariant)), this, SLOT(handleConversationCreated(QDBusVariant)));
         delete m_conversationsInterface;
     }
@@ -71,7 +71,7 @@ void ConversationModel::setDeviceId(const QString &deviceId)
 
     m_conversationsInterface = new DeviceConversationsDbusInterface(deviceId, this);
     connect(m_conversationsInterface, SIGNAL(conversationUpdated(QDBusVariant)), this, SLOT(handleConversationUpdate(QDBusVariant)));
-    connect(m_conversationsInterface, SIGNAL(conversationLoaded(qint64, quint64)), this, SLOT(handleConversationLoaded(qint64, quint64)));
+    connect(m_conversationsInterface, SIGNAL(conversationLoaded(qint64, quint64)), this, SLOT(handleConversationLoaded(qint64)));
     connect(m_conversationsInterface, SIGNAL(conversationCreated(QDBusVariant)), this, SLOT(handleConversationCreated(QDBusVariant)));
 
     connect(m_conversationsInterface, SIGNAL(attachmentReceived(QString, QString)), this, SIGNAL(filePathReceived(QString, QString)));
@@ -205,9 +205,8 @@ void ConversationModel::handleConversationCreated(const QDBusVariant &msg)
     }
 }
 
-void ConversationModel::handleConversationLoaded(qint64 threadID, quint64 numMessages)
+void ConversationModel::handleConversationLoaded(qint64 threadID)
 {
-    Q_UNUSED(numMessages)
     if (threadID != m_threadId) {
         return;
     }
diff --git a/smsapp/conversationmodel.h b/smsapp/conversationmodel.h
index 399e3e56d..51314f00b 100644
--- a/smsapp/conversationmodel.h
+++ b/smsapp/conversationmodel.h
@@ -68,7 +68,7 @@ Q_SIGNALS:
 
 private Q_SLOTS:
     void handleConversationUpdate(const QDBusVariant &message);
-    void handleConversationLoaded(qint64 threadID, quint64 numMessages);
+    void handleConversationLoaded(qint64 threadID);
     void handleConversationCreated(const QDBusVariant &message);
 
 private:
diff --git a/smsapp/smshelper.cpp b/smsapp/smshelper.cpp
index fb5bccea9..e9142aa76 100644
--- a/smsapp/smshelper.cpp
+++ b/smsapp/smshelper.cpp
@@ -26,11 +26,8 @@
 #include "smsapp/gsmasciimap.h"
 #include "smshelper_debug.h"
 
-QObject *SmsHelper::singletonProvider(QQmlEngine *engine, QJSEngine *scriptEngine)
+QObject *SmsHelper::singletonProvider(QQmlEngine * /*engine*/, QJSEngine * /*scriptEngine*/)
 {
-    Q_UNUSED(engine);
-    Q_UNUSED(scriptEngine);
-
     return new SmsHelper();
 }
 
diff --git a/smsapp/thumbnailsprovider.cpp b/smsapp/thumbnailsprovider.cpp
index 1d43ce0c6..1caee1941 100644
--- a/smsapp/thumbnailsprovider.cpp
+++ b/smsapp/thumbnailsprovider.cpp
@@ -11,11 +11,8 @@ ThumbnailsProvider::ThumbnailsProvider()
 {
 }
 
-QImage ThumbnailsProvider::requestImage(const QString &id, QSize *size, const QSize &requestedSize)
+QImage ThumbnailsProvider::requestImage(const QString &id, QSize * /*size*/, const QSize & /*requestedSize*/)
 {
-    Q_UNUSED(size)
-    Q_UNUSED(requestedSize)
-
     if (m_thumbnails.contains(id)) {
         return m_thumbnails.value(id);
     }