diff --git a/app/src/main/java/org/linphone/contacts/ContactLoader.kt b/app/src/main/java/org/linphone/contacts/ContactLoader.kt
index a6096c6a7..07abcb678 100644
--- a/app/src/main/java/org/linphone/contacts/ContactLoader.kt
+++ b/app/src/main/java/org/linphone/contacts/ContactLoader.kt
@@ -291,7 +291,7 @@ class ContactLoader : LoaderManager.LoaderCallbacks<Cursor> {
 
         if (core.globalState == GlobalState.Shutdown || core.globalState == GlobalState.Off) {
             Log.w("$TAG Core is being stopped or already destroyed, abort")
-        } else if (friends.isEmpty()) {
+        } else if (friends.isEmpty) {
             Log.w("$TAG No friend created!")
         } else {
             Log.i("$TAG ${friends.size} friends fetched")
diff --git a/app/src/main/java/org/linphone/ui/main/chat/fragment/ConversationFragment.kt b/app/src/main/java/org/linphone/ui/main/chat/fragment/ConversationFragment.kt
index 10b210fa0..629817b5d 100644
--- a/app/src/main/java/org/linphone/ui/main/chat/fragment/ConversationFragment.kt
+++ b/app/src/main/java/org/linphone/ui/main/chat/fragment/ConversationFragment.kt
@@ -1276,7 +1276,7 @@ open class ConversationFragment : SlidingPaneChildFragment() {
 
             val model = MessageReactionsModel(chatMessageModel.chatMessage) { reactionsModel ->
                 coreContext.postOnMainThread {
-                    if (reactionsModel.allReactions.isEmpty()) {
+                    if (reactionsModel.allReactions.isEmpty) {
                         Log.i("$TAG No reaction to display, closing bottom sheet")
                         val bottomSheetBehavior = BottomSheetBehavior.from(
                             binding.messageBottomSheet.root
diff --git a/app/src/main/java/org/linphone/ui/main/chat/viewmodel/ConversationViewModel.kt b/app/src/main/java/org/linphone/ui/main/chat/viewmodel/ConversationViewModel.kt
index 3e4338eea..788346f7e 100644
--- a/app/src/main/java/org/linphone/ui/main/chat/viewmodel/ConversationViewModel.kt
+++ b/app/src/main/java/org/linphone/ui/main/chat/viewmodel/ConversationViewModel.kt
@@ -288,7 +288,7 @@ class ConversationViewModel
                 list.remove(found)
                 eventsList = list
                 updateEvents.postValue(Event(true))
-                isEmpty.postValue(eventsList.isEmpty())
+                isEmpty.postValue(eventsList.isEmpty)
             } else {
                 Log.e("$TAG Failed to find matching message in conversation events list")
             }
@@ -428,7 +428,7 @@ class ConversationViewModel
                 list.remove(found)
                 eventsList = list
                 updateEvents.postValue(Event(true))
-                isEmpty.postValue(eventsList.isEmpty())
+                isEmpty.postValue(eventsList.isEmpty)
             } else {
                 Log.e(
                     "$TAG Failed to find chat message id [${chatMessageModel.id}] in events list!"
@@ -524,7 +524,7 @@ class ConversationViewModel
                 list.addAll(eventsList)
                 eventsList = list
                 updateEvents.postValue(Event(true))
-                isEmpty.postValue(eventsList.isEmpty())
+                isEmpty.postValue(eventsList.isEmpty)
             }
         }
     }
@@ -647,7 +647,7 @@ class ConversationViewModel
         Log.i("$TAG Extracted [${list.size}] events from conversation history in database")
         eventsList = list
         updateEvents.postValue(Event(true))
-        isEmpty.postValue(eventsList.isEmpty())
+        isEmpty.postValue(eventsList.isEmpty)
     }
 
     @WorkerThread
@@ -694,7 +694,7 @@ class ConversationViewModel
         list.addAll(newList)
         eventsList = list
         updateEvents.postValue(Event(true))
-        isEmpty.postValue(eventsList.isEmpty())
+        isEmpty.postValue(eventsList.isEmpty)
     }
 
     @WorkerThread
@@ -726,7 +726,7 @@ class ConversationViewModel
         list.addAll(eventsList)
         eventsList = list
         updateEvents.postValue(Event(true))
-        isEmpty.postValue(eventsList.isEmpty())
+        isEmpty.postValue(eventsList.isEmpty)
     }
 
     @WorkerThread
@@ -784,7 +784,7 @@ class ConversationViewModel
             eventsList.addAll(processGroupedEvents(arrayListOf(event)))
         } else {
             for (event in history) {
-                if (groupedEventLogs.isEmpty()) {
+                if (groupedEventLogs.isEmpty) {
                     groupedEventLogs.add(event)
                     continue
                 }
diff --git a/app/src/main/java/org/linphone/ui/main/chat/viewmodel/SendMessageInConversationViewModel.kt b/app/src/main/java/org/linphone/ui/main/chat/viewmodel/SendMessageInConversationViewModel.kt
index 9702a26bb..cd9d6ccad 100644
--- a/app/src/main/java/org/linphone/ui/main/chat/viewmodel/SendMessageInConversationViewModel.kt
+++ b/app/src/main/java/org/linphone/ui/main/chat/viewmodel/SendMessageInConversationViewModel.kt
@@ -409,7 +409,7 @@ class SendMessageInConversationViewModel
         attachments.value = list
         maxNumberOfAttachmentsReached.value = list.size >= MAX_FILES_TO_ATTACH
 
-        if (list.isEmpty()) {
+        if (list.isEmpty) {
             isFileAttachmentsListOpen.value = false
         }
     }
diff --git a/app/src/main/java/org/linphone/ui/main/meetings/viewmodel/MeetingsListViewModel.kt b/app/src/main/java/org/linphone/ui/main/meetings/viewmodel/MeetingsListViewModel.kt
index 4496aa6d8..c3a2fb6c2 100644
--- a/app/src/main/java/org/linphone/ui/main/meetings/viewmodel/MeetingsListViewModel.kt
+++ b/app/src/main/java/org/linphone/ui/main/meetings/viewmodel/MeetingsListViewModel.kt
@@ -177,7 +177,7 @@ class MeetingsListViewModel
                 val organizerCheck = info.organizer?.asStringUriOnly()?.contains(
                     filter,
                     ignoreCase = true
-                ) ?: false
+                ) == true
                 val subjectCheck = info.subject?.contains(filter, ignoreCase = true) == true
                 val descriptionCheck = info.description?.contains(filter, ignoreCase = true) == true
                 val participantsCheck = info.participantInfos.find {
diff --git a/app/src/main/java/org/linphone/ui/main/viewmodel/AddressSelectionViewModel.kt b/app/src/main/java/org/linphone/ui/main/viewmodel/AddressSelectionViewModel.kt
index 3b8c83c2c..00eae160b 100644
--- a/app/src/main/java/org/linphone/ui/main/viewmodel/AddressSelectionViewModel.kt
+++ b/app/src/main/java/org/linphone/ui/main/viewmodel/AddressSelectionViewModel.kt
@@ -328,7 +328,7 @@ abstract class AddressSelectionViewModel
         list.addAll(contactsList)
         list.addAll(suggestionsList)
         modelsList.postValue(list)
-        isEmpty.postValue(list.isEmpty())
+        isEmpty.postValue(list.isEmpty)
         Log.i(
             "$TAG Processed [${results.size}] results: [${conversationsList.size}] conversations, [${favoritesList.size}] favorites, [${contactsList.size}] contacts and [${suggestionsList.size}] suggestions"
         )
diff --git a/app/src/main/res/layout/account_list_cell.xml b/app/src/main/res/layout/account_list_cell.xml
index c37a87ee4..94a7ff754 100644
--- a/app/src/main/res/layout/account_list_cell.xml
+++ b/app/src/main/res/layout/account_list_cell.xml
@@ -104,6 +104,7 @@
             android:layout_marginEnd="16dp"
             android:src="@drawable/voicemail"
             android:visibility="@{model.showMwi ? View.VISIBLE : View.GONE, default=gone}"
+            android:contentDescription="@string/content_description_voicemail_available"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintTop_toBottomOf="@id/voicemail_count"
             app:layout_constraintEnd_toStartOf="@id/notifications_count"/>
diff --git a/app/src/main/res/layout/chat_list_cell.xml b/app/src/main/res/layout/chat_list_cell.xml
index a166d7982..cb6250bbb 100644
--- a/app/src/main/res/layout/chat_list_cell.xml
+++ b/app/src/main/res/layout/chat_list_cell.xml
@@ -106,6 +106,7 @@
             android:layout_marginTop="3dp"
             android:src="@drawable/forward"
             android:visibility="@{model.isLastMessageForwarded ? View.VISIBLE : View.GONE, default=gone}"
+            android:contentDescription="@null"
             app:layout_constraintStart_toEndOf="@id/last_message_sender"
             app:layout_constraintEnd_toStartOf="@id/last_message_or_composing"
             app:layout_constraintTop_toTopOf="@id/last_message_or_composing"
diff --git a/app/src/main/res/layout/help_debug_fragment.xml b/app/src/main/res/layout/help_debug_fragment.xml
index 5450fd7f1..0e7412ce6 100644
--- a/app/src/main/res/layout/help_debug_fragment.xml
+++ b/app/src/main/res/layout/help_debug_fragment.xml
@@ -193,6 +193,7 @@
                 android:layout_marginStart="5dp"
                 android:layout_marginEnd="16dp"
                 android:src="@drawable/copy"
+                android:contentDescription="@string/content_description_copy_text_to_clipboard"
                 app:tint="?attr/color_main2_600"
                 app:layout_constraintTop_toTopOf="@id/app_version_subtitle"
                 app:layout_constraintBottom_toBottomOf="@id/app_version_subtitle"
@@ -250,6 +251,7 @@
                 android:layout_marginStart="5dp"
                 android:layout_marginEnd="16dp"
                 android:src="@drawable/copy"
+                android:contentDescription="@string/content_description_copy_text_to_clipboard"
                 app:tint="?attr/color_main2_600"
                 app:layout_constraintTop_toTopOf="@id/sdk_version_subtitle"
                 app:layout_constraintBottom_toBottomOf="@id/sdk_version_subtitle"
diff --git a/app/src/main/res/layout/meetings_list_decoration.xml b/app/src/main/res/layout/meetings_list_decoration.xml
index a4caadb97..174f6edf4 100644
--- a/app/src/main/res/layout/meetings_list_decoration.xml
+++ b/app/src/main/res/layout/meetings_list_decoration.xml
@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<layout xmlns:tools="http://schemas.android.com/tools"
-    xmlns:android="http://schemas.android.com/apk/res/android">
+<layout xmlns:android="http://schemas.android.com/apk/res/android">
 
     <data>
         <import type="android.view.View" />
diff --git a/app/src/main/res/values-fr/strings.xml b/app/src/main/res/values-fr/strings.xml
index 1c808a49d..ab6f1f596 100644
--- a/app/src/main/res/values-fr/strings.xml
+++ b/app/src/main/res/values-fr/strings.xml
@@ -748,7 +748,7 @@
     <string name="generic_address_picker_favorites_list_title">Favoris</string>
     <string name="generic_address_picker_suggestions_list_title">Suggestions</string>
     <string name="post_notifications_permission_not_granted">La permission de poster des notifications n\'est pas donnée !</string>
-    <plurals name="mwi_messages_are_waiting">
+    <plurals name="mwi_messages_are_waiting" tools:ignore="MissingQuantity">
         <item quantity="one">%s message vocal en attente</item>
         <item quantity="other">%s messages vocaux en attente</item>
     </plurals>
diff --git a/app/src/main/res/values/colors.xml b/app/src/main/res/values/colors.xml
index b85f95d08..10aaf2d1b 100644
--- a/app/src/main/res/values/colors.xml
+++ b/app/src/main/res/values/colors.xml
@@ -14,7 +14,6 @@
     <color name="orange_main_300">#FFB266</color>
     <color name="orange_main_500">#FF5E00</color>
     <color name="orange_main_700">#B72D00</color>
-    <color name="orange_main_900">#7F2F00</color>
 
     <color name="gray_main2_100">#EEF6F8</color>
     <color name="gray_main2_200">#DFECF2</color>
@@ -64,40 +63,34 @@
     <color name="yellow_main_300">#FFE799</color>
     <color name="yellow_main_500">#F5BC00</color>
     <color name="yellow_main_700">#A37D00</color>
-    <color name="yellow_main_900">#806200</color>
 
     <color name="green_main_100">#DCF9E7</color>
     <color name="green_main_100_alpha_50">#80DCF9E7</color>
     <color name="green_main_300">#A8F0C2</color>
     <color name="green_main_500">#25D366</color>
     <color name="green_main_700">#1C9C4B</color>
-    <color name="green_main_900">#136c34</color>
 
     <color name="blue_main_100">#D6F4FF</color>
     <color name="blue_main_100_alpha_50">#80D6F4FF</color>
     <color name="blue_main_300">#99E4FF</color>
     <color name="blue_main_500">#00aff0</color>
     <color name="blue_main_700">#0078A3</color>
-    <color name="blue_main_900">#005d80</color>
 
     <color name="red_main_100">#FBE1DA</color>
     <color name="red_main_100_alpha_50">#80FBE1DA</color>
     <color name="red_main_300">#F5B53A</color>
     <color name="red_main_500">#E14318</color>
     <color name="red_main_700">#A63211</color>
-    <color name="red_main_900">#73220c</color>
 
     <color name="pink_main_100">#FFD6F1</color>
     <color name="pink_main_100_alpha_50">#80FFD6F1</color>
     <color name="pink_main_300">#FF99DD</color>
     <color name="pink_main_500">#FF00A9</color>
     <color name="pink_main_700">#B8007A</color>
-    <color name="pink_main_900">#800055</color>
 
     <color name="purple_main_100">#FFD6FF</color>
     <color name="purple_main_100_alpha_50">#80FFD6FF</color>
     <color name="purple_main_300">#FF99FF</color>
     <color name="purple_main_500">#800080</color>
     <color name="purple_main_700">#520052</color>
-    <color name="purple_main_900">#80007f</color>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/dimen.xml b/app/src/main/res/values/dimen.xml
index 544eda04d..e59668806 100644
--- a/app/src/main/res/values/dimen.xml
+++ b/app/src/main/res/values/dimen.xml
@@ -57,7 +57,6 @@
     <dimen name="popup_menu_padding">15dp</dimen>
     <dimen name="popup_menu_item_top_margin">20dp</dimen>
 
-    <dimen name="call_top_bar_text_height">28dp</dimen>
     <dimen name="call_remote_video_top_margin">70dp</dimen> <!-- Size of top text + top & bottom margins -->
     <dimen name="call_main_actions_menu_height">110dp</dimen>
     <dimen name="call_all_actions_menu_height">345dp</dimen> <!-- sum of above two -->
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 3dd404c28..0b28e1895 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -863,7 +863,6 @@
     <string name="content_description_chat_cancel_reply">Message will no longer be a reply to a previous message</string>
     <string name="content_description_chat_open_emoji_picker">Opens emoji picker</string>
     <string name="content_description_chat_open_attach_file">Opens file picker</string>
-    <string name="content_description_chat_take_picture">Opens camera to take a picture</string>
     <string name="content_description_chat_edit_conversation_subject">Click to edit the subject of this conversation</string>
     <string name="content_description_chat_toggle_mute">Silences on/off this conversation</string>
     <string name="content_description_chat_removal_in_progress">Conversation is being removed</string>
@@ -889,6 +888,8 @@
     <string name="content_description_ldap_save">Save LDAP configuration</string>
     <string name="content_description_play_call_recording">Plays the call recording</string>
     <string name="content_description_go_to_conversation">Go to conversation</string>
+    <string name="content_description_copy_text_to_clipboard">Copy text to clipboard</string>
+    <string name="content_description_voicemail_available">Voice message are available</string>
 
     <!-- Copy of private hosts_allowlist_sample in androidx.car.app:app:1.7.0-beta01, as they recommend it -->
     <string-array name="hosts_allowlist_sample_copy" translatable="false">