diff --git a/src/components/assistant/AssistantModel.cpp b/src/components/assistant/AssistantModel.cpp
index 9f1601c3f..162cc307a 100644
--- a/src/components/assistant/AssistantModel.cpp
+++ b/src/components/assistant/AssistantModel.cpp
@@ -64,7 +64,7 @@ private:
   ) override {
     if (status == linphone::AccountCreatorStatusAccountExist || status == linphone::AccountCreatorStatusAccountExistWithAlias) {
       shared_ptr<linphone::ProxyConfig> proxyConfig = creator->createProxyConfig();
-      Q_ASSERT(proxyConfig != nullptr);
+      Q_CHECK_PTR(proxyConfig);
 
       emit mAssistant->loginStatusChanged("");
     } else {
@@ -86,7 +86,7 @@ private:
     ) {
       if (creator->getEmail().empty()) {
         shared_ptr<linphone::ProxyConfig> proxyConfig = creator->createProxyConfig();
-        Q_ASSERT(proxyConfig != nullptr);
+        Q_CHECK_PTR(proxyConfig);
       }
 
       emit mAssistant->activateStatusChanged("");
@@ -105,7 +105,7 @@ private:
   ) override {
     if (status == linphone::AccountCreatorStatusAccountActivated) {
       shared_ptr<linphone::ProxyConfig> proxyConfig = creator->createProxyConfig();
-      Q_ASSERT(proxyConfig != nullptr);
+      Q_CHECK_PTR(proxyConfig);
 
       emit mAssistant->activateStatusChanged("");
     } else {
diff --git a/src/components/call/CallModel.cpp b/src/components/call/CallModel.cpp
index 90f8ef00d..a3ae2b0d1 100644
--- a/src/components/call/CallModel.cpp
+++ b/src/components/call/CallModel.cpp
@@ -38,7 +38,7 @@ using namespace std;
 // =============================================================================
 
 CallModel::CallModel (shared_ptr<linphone::Call> call) {
-  Q_ASSERT(call != nullptr);
+  Q_CHECK_PTR(call);
   mCall = call;
   mCall->setData("call-model", *this);
 
diff --git a/src/components/conference/ConferenceAddModel.cpp b/src/components/conference/ConferenceAddModel.cpp
index 8196b91ef..b1de6639a 100644
--- a/src/components/conference/ConferenceAddModel.cpp
+++ b/src/components/conference/ConferenceAddModel.cpp
@@ -31,7 +31,7 @@ using namespace std;
 
 ConferenceHelperModel::ConferenceAddModel::ConferenceAddModel (QObject *parent) : QAbstractListModel(parent) {
   mConferenceHelperModel = qobject_cast<ConferenceHelperModel *>(parent);
-  Q_ASSERT(mConferenceHelperModel != nullptr);
+  Q_CHECK_PTR(mConferenceHelperModel);
 
   CoreManager *coreManager = CoreManager::getInstance();
 
@@ -134,7 +134,7 @@ void ConferenceHelperModel::ConferenceAddModel::update () {
   list<shared_ptr<linphone::Address> > linphoneAddresses;
   for (const auto &map : mRefs) {
     shared_ptr<linphone::Address> linphoneAddress = map->value("__linphoneAddress").value<shared_ptr<linphone::Address> >();
-    Q_ASSERT(linphoneAddress != nullptr);
+    Q_CHECK_PTR(linphoneAddress);
     linphoneAddresses.push_back(linphoneAddress);
   }
 
diff --git a/src/components/contact/ContactModel.cpp b/src/components/contact/ContactModel.cpp
index f2e73f704..e59f4b5c8 100644
--- a/src/components/contact/ContactModel.cpp
+++ b/src/components/contact/ContactModel.cpp
@@ -31,7 +31,7 @@ using namespace std;
 // =============================================================================
 
 ContactModel::ContactModel (QObject *parent, shared_ptr<linphone::Friend> linphoneFriend) : QObject(parent) {
-  Q_ASSERT(linphoneFriend != nullptr);
+  Q_CHECK_PTR(linphoneFriend);
 
   mLinphoneFriend = linphoneFriend;
   mLinphoneFriend->setData("contact-model", *this);
@@ -40,8 +40,8 @@ ContactModel::ContactModel (QObject *parent, shared_ptr<linphone::Friend> linpho
 }
 
 ContactModel::ContactModel (QObject *parent, VcardModel *vcardModel) : QObject(parent) {
-  Q_ASSERT(vcardModel != nullptr);
-  Q_ASSERT(vcardModel->mVcard != nullptr);
+  Q_CHECK_PTR(vcardModel);
+  Q_CHECK_PTR(vcardModel->mVcard);
   Q_ASSERT(!vcardModel->mIsReadOnly);
 
   mLinphoneFriend = linphone::Friend::newFromVcard(vcardModel->mVcard);
@@ -86,7 +86,7 @@ void ContactModel::setVcardModel (VcardModel *vcardModel) {
 }
 
 void ContactModel::setVcardModelInternal (VcardModel *vcardModel) {
-  Q_ASSERT(vcardModel != nullptr);
+  Q_CHECK_PTR(vcardModel);
   Q_ASSERT(vcardModel != mVcardModel);
 
   mVcardModel = vcardModel;
@@ -100,7 +100,7 @@ void ContactModel::setVcardModelInternal (VcardModel *vcardModel) {
 }
 
 void ContactModel::updateSipAddresses (VcardModel *oldVcardModel) {
-  Q_ASSERT(oldVcardModel != nullptr);
+  Q_CHECK_PTR(oldVcardModel);
 
   QVariantList oldSipAddresses = oldVcardModel->getSipAddresses();
   QVariantList sipAddresses = mVcardModel->getSipAddresses();
@@ -139,7 +139,7 @@ next:
 // -----------------------------------------------------------------------------
 
 void ContactModel::mergeVcardModel (VcardModel *vcardModel) {
-  Q_ASSERT(vcardModel != nullptr);
+  Q_CHECK_PTR(vcardModel);
 
   qInfo() << QStringLiteral("Merge vcard into contact:") << this << vcardModel;
 
@@ -184,8 +184,8 @@ void ContactModel::mergeVcardModel (VcardModel *vcardModel) {
 
 VcardModel *ContactModel::cloneVcardModel () const {
   shared_ptr<linphone::Vcard> vcard = mVcardModel->mVcard->clone();
-  Q_ASSERT(vcard != nullptr);
-  Q_ASSERT(vcard->getVcard() != nullptr);
+  Q_CHECK_PTR(vcard);
+  Q_CHECK_PTR(vcard->getVcard());
 
   mLinphoneFriend->edit();
 
diff --git a/src/components/contact/VcardModel.cpp b/src/components/contact/VcardModel.cpp
index eecd2ea98..53eeea305 100644
--- a/src/components/contact/VcardModel.cpp
+++ b/src/components/contact/VcardModel.cpp
@@ -112,7 +112,7 @@ static string interpretSipAddress (const QString &sipAddress) {
 // -----------------------------------------------------------------------------
 
 VcardModel::VcardModel (shared_ptr<linphone::Vcard> vcard, bool isReadOnly) {
-  Q_ASSERT(vcard != nullptr);
+  Q_CHECK_PTR(vcard);
   mVcard = vcard;
   mIsReadOnly = isReadOnly;
 }
diff --git a/src/components/core/CoreManager.cpp b/src/components/core/CoreManager.cpp
index 2d291948e..7f7a0981b 100644
--- a/src/components/core/CoreManager.cpp
+++ b/src/components/core/CoreManager.cpp
@@ -86,7 +86,7 @@ void CoreManager::uninit () {
 
 // -----------------------------------------------------------------------------
 
-VcardModel *CoreManager::createDetachedVcardModel () {
+VcardModel *CoreManager::createDetachedVcardModel () const {
   VcardModel *vcardModel = new VcardModel(linphone::Factory::get()->createVcard(), false);
   qInfo() << QStringLiteral("Create detached vcard:") << vcardModel;
   return vcardModel;
diff --git a/src/components/core/CoreManager.hpp b/src/components/core/CoreManager.hpp
index 6ccbc3cbd..e588fcda0 100644
--- a/src/components/core/CoreManager.hpp
+++ b/src/components/core/CoreManager.hpp
@@ -49,12 +49,12 @@ public:
   ~CoreManager () = default;
 
   std::shared_ptr<linphone::Core> getCore () {
-    Q_ASSERT(mCore != nullptr);
+    Q_CHECK_PTR(mCore);
     return mCore;
   }
 
   std::shared_ptr<CoreHandlers> getHandlers () {
-    Q_ASSERT(mHandlers != nullptr);
+    Q_CHECK_PTR(mHandlers);
     return mHandlers;
   }
 
@@ -75,27 +75,27 @@ public:
   // ---------------------------------------------------------------------------
 
   CallsListModel *getCallsListModel () const {
-    Q_ASSERT(mCallsListModel != nullptr);
+    Q_CHECK_PTR(mCallsListModel);
     return mCallsListModel;
   }
 
   ContactsListModel *getContactsListModel () const {
-    Q_ASSERT(mContactsListModel != nullptr);
+    Q_CHECK_PTR(mContactsListModel);
     return mContactsListModel;
   }
 
   SipAddressesModel *getSipAddressesModel () const {
-    Q_ASSERT(mSipAddressesModel != nullptr);
+    Q_CHECK_PTR(mSipAddressesModel);
     return mSipAddressesModel;
   }
 
   SettingsModel *getSettingsModel () const {
-    Q_ASSERT(mSettingsModel != nullptr);
+    Q_CHECK_PTR(mSettingsModel);
     return mSettingsModel;
   }
 
   AccountSettingsModel *getAccountSettingsModel () const {
-    Q_ASSERT(mAccountSettingsModel != nullptr);
+    Q_CHECK_PTR(mAccountSettingsModel);
     return mAccountSettingsModel;
   }
 
@@ -107,7 +107,7 @@ public:
   static void uninit ();
 
   static CoreManager *getInstance () {
-    Q_ASSERT(mInstance != nullptr);
+    Q_CHECK_PTR(mInstance);
     return mInstance;
   }
 
@@ -115,10 +115,12 @@ public:
 
   // Must be used in a qml scene.
   // Warning: The ownership of `VcardModel` is `QQmlEngine::JavaScriptOwnership` by default.
-  Q_INVOKABLE VcardModel *createDetachedVcardModel ();
+  Q_INVOKABLE VcardModel *createDetachedVcardModel () const;
 
   Q_INVOKABLE void forceRefreshRegisters ();
 
+  Q_INVOKABLE void sendLogs () const;
+
 signals:
   void coreCreated ();
   void coreStarted ();
diff --git a/src/components/notifier/Notifier.cpp b/src/components/notifier/Notifier.cpp
index 28a47f4ef..8b04f474d 100644
--- a/src/components/notifier/Notifier.cpp
+++ b/src/components/notifier/Notifier.cpp
@@ -134,10 +134,10 @@ QObject *Notifier::createNotification (Notifier::NotificationType type) {
 
   {
     QQuickWindow *window = instance->findChild<QQuickWindow *>(NOTIFICATION_PROPERTY_WINDOW);
-    Q_ASSERT(window != nullptr);
+    Q_CHECK_PTR(window);
 
     QScreen *screen = window->screen();
-    Q_ASSERT(screen != nullptr);
+    Q_CHECK_PTR(screen);
 
     QRect geometry = screen->availableGeometry();
 
diff --git a/src/components/settings/AccountSettingsModel.cpp b/src/components/settings/AccountSettingsModel.cpp
index 91fa341ea..772bbe611 100644
--- a/src/components/settings/AccountSettingsModel.cpp
+++ b/src/components/settings/AccountSettingsModel.cpp
@@ -60,7 +60,7 @@ AccountSettingsModel::AccountSettingsModel (QObject *parent) : QObject(parent) {
 // -----------------------------------------------------------------------------
 
 bool AccountSettingsModel::addOrUpdateProxyConfig (const shared_ptr<linphone::ProxyConfig> &proxyConfig) {
-  Q_ASSERT(proxyConfig != nullptr);
+  Q_CHECK_PTR(proxyConfig);
 
   shared_ptr<linphone::Core> core = CoreManager::getInstance()->getCore();
 
@@ -83,7 +83,7 @@ bool AccountSettingsModel::addOrUpdateProxyConfig (const shared_ptr<linphone::Pr
 }
 
 QVariantMap AccountSettingsModel::getProxyConfigDescription (const shared_ptr<linphone::ProxyConfig> &proxyConfig) {
-  Q_ASSERT(proxyConfig != nullptr);
+  Q_CHECK_PTR(proxyConfig);
 
   QVariantMap map;
 
@@ -114,7 +114,7 @@ void AccountSettingsModel::setDefaultProxyConfig (const shared_ptr<linphone::Pro
 }
 
 void AccountSettingsModel::removeProxyConfig (const shared_ptr<linphone::ProxyConfig> &proxyConfig) {
-  Q_ASSERT(proxyConfig != nullptr);
+  Q_CHECK_PTR(proxyConfig);
 
   CoreManager::getInstance()->getCore()->removeProxyConfig(proxyConfig);
   emit accountSettingsUpdated();
@@ -124,7 +124,7 @@ bool AccountSettingsModel::addOrUpdateProxyConfig (
   const shared_ptr<linphone::ProxyConfig> &proxyConfig,
   const QVariantMap &data
 ) {
-  Q_ASSERT(proxyConfig != nullptr);
+  Q_CHECK_PTR(proxyConfig);
 
   QString literal = data["sipAddress"].toString();