diff --git a/app/src/main/java/org/linphone/ui/main/MainActivity.kt b/app/src/main/java/org/linphone/ui/main/MainActivity.kt
index 35d63aae0..069dd812d 100644
--- a/app/src/main/java/org/linphone/ui/main/MainActivity.kt
+++ b/app/src/main/java/org/linphone/ui/main/MainActivity.kt
@@ -76,16 +76,18 @@ class MainActivity : AppCompatActivity() {
         }
         binding.viewModel = viewModel
 
-        viewModel.changeSystemTopBarColorToInCallEvent.observe(this) {
-            it.consume { useInCallColor ->
-                val color = if (useInCallColor) {
-                    AppUtils.getColor(R.color.green_success_500)
-                } else {
-                    AppUtils.getColor(R.color.orange_main_500)
+        viewModel.changeSystemTopBarColorEvent.observe(this) {
+            it.consume { mode ->
+                val color = when (mode) {
+                    MainViewModel.IN_CALL -> AppUtils.getColor(R.color.green_success_500)
+                    MainViewModel.ACCOUNT_REGISTRATION_FAILURE -> AppUtils.getColor(
+                        R.color.red_danger_500
+                    )
+                    else -> AppUtils.getColor(R.color.orange_main_500)
                 }
                 lifecycleScope.launch {
                     withContext(Dispatchers.IO) {
-                        delay(if (useInCallColor) 1000 else 0)
+                        delay(if (mode == MainViewModel.IN_CALL) 1000 else 0)
                         withContext(Dispatchers.Main) {
                             window.statusBarColor = color
                         }
diff --git a/app/src/main/java/org/linphone/ui/main/viewmodel/MainViewModel.kt b/app/src/main/java/org/linphone/ui/main/viewmodel/MainViewModel.kt
index b5784fe84..d12a40000 100644
--- a/app/src/main/java/org/linphone/ui/main/viewmodel/MainViewModel.kt
+++ b/app/src/main/java/org/linphone/ui/main/viewmodel/MainViewModel.kt
@@ -38,11 +38,17 @@ import org.linphone.utils.LinphoneUtils
 class MainViewModel @UiThread constructor() : ViewModel() {
     companion object {
         private const val TAG = "[Main ViewModel]"
+
+        const val NONE = 0
+        const val ACCOUNT_REGISTRATION_FAILURE = 1
+        const val IN_CALL = 2
     }
 
-    val atLastOneCall = MutableLiveData<Boolean>()
+    val showTopBar = MutableLiveData<Boolean>()
 
-    val callsLabel = MutableLiveData<String>()
+    val atLeastOneCall = MutableLiveData<Boolean>()
+
+    val callLabel = MutableLiveData<String>()
 
     val callsStatus = MutableLiveData<String>()
 
@@ -50,8 +56,8 @@ class MainViewModel @UiThread constructor() : ViewModel() {
         MutableLiveData<Event<Boolean>>()
     }
 
-    val changeSystemTopBarColorToInCallEvent: MutableLiveData<Event<Boolean>> by lazy {
-        MutableLiveData<Event<Boolean>>()
+    val changeSystemTopBarColorEvent: MutableLiveData<Event<Int>> by lazy {
+        MutableLiveData<Event<Int>>()
     }
 
     val goBackToCallEvent: MutableLiveData<Event<Boolean>> by lazy {
@@ -64,7 +70,7 @@ class MainViewModel @UiThread constructor() : ViewModel() {
         @WorkerThread
         override fun onLastCallEnded(core: Core) {
             Log.i("$TAG Last call ended, asking fragment to change back status bar color")
-            changeSystemTopBarColorToInCallEvent.postValue(Event(false))
+            changeSystemTopBarColorEvent.postValue(Event(NONE))
         }
 
         @WorkerThread
@@ -77,7 +83,9 @@ class MainViewModel @UiThread constructor() : ViewModel() {
             if (core.callsNb > 0) {
                 updateCurrentCallInfo()
             }
-            atLastOneCall.postValue(core.callsNb > 0)
+            val calls = core.callsNb > 0
+            showTopBar.postValue(calls)
+            atLeastOneCall.postValue(calls)
         }
 
         @WorkerThread
@@ -94,7 +102,16 @@ class MainViewModel @UiThread constructor() : ViewModel() {
                         defaultAccountRegistrationFailed = true
                         defaultAccountRegistrationErrorEvent.postValue(Event(true))
                     } else {
-                        // TODO: show red top bar for non-default account registration failure
+                        Log.e("$TAG Non-default account registration failed!")
+                        // Do not show connection error top bar if there is a call
+                        if (atLeastOneCall.value == false) {
+                            changeSystemTopBarColorEvent.postValue(
+                                Event(
+                                    ACCOUNT_REGISTRATION_FAILURE
+                                )
+                            )
+                            showTopBar.postValue(true)
+                        }
                     }
                 }
                 RegistrationState.Ok -> {
@@ -103,7 +120,17 @@ class MainViewModel @UiThread constructor() : ViewModel() {
                         defaultAccountRegistrationFailed = false
                         defaultAccountRegistrationErrorEvent.postValue(Event(false))
                     } else {
-                        // TODO: hide red top bar for non-default account registration failure
+                        // If no call and no account is in Failed state, hide top bar
+                        val found = core.accountList.find {
+                            it.state == RegistrationState.Failed
+                        }
+                        if (found == null) {
+                            Log.i("$TAG No account in Failed state anymore")
+                            if (atLeastOneCall.value == false) {
+                                changeSystemTopBarColorEvent.postValue(Event(NONE))
+                                showTopBar.postValue(false)
+                            }
+                        }
                     }
                 }
                 else -> {}
@@ -113,6 +140,7 @@ class MainViewModel @UiThread constructor() : ViewModel() {
 
     init {
         defaultAccountRegistrationFailed = false
+        showTopBar.value = false
 
         coreContext.postOnCoreThread { core ->
             core.addListener(coreListener)
@@ -120,7 +148,10 @@ class MainViewModel @UiThread constructor() : ViewModel() {
             if (core.callsNb > 0) {
                 updateCurrentCallInfo()
             }
-            atLastOneCall.postValue(core.callsNb > 0)
+
+            val calls = core.callsNb > 0
+            showTopBar.postValue(calls)
+            atLeastOneCall.postValue(calls)
         }
     }
 
@@ -134,7 +165,12 @@ class MainViewModel @UiThread constructor() : ViewModel() {
     }
 
     @UiThread
-    fun goBackToCall() {
+    fun closeTopBar() {
+        showTopBar.value = false
+    }
+
+    @UiThread
+    fun onTopBarClicked() {
         goBackToCallEvent.value = Event(true)
     }
 
@@ -147,7 +183,7 @@ class MainViewModel @UiThread constructor() : ViewModel() {
                 val contact = coreContext.contactsManager.findContactByAddress(
                     currentCall.remoteAddress
                 )
-                callsLabel.postValue(
+                callLabel.postValue(
                     contact?.name ?: LinphoneUtils.getDisplayName(currentCall.remoteAddress)
                 )
                 callsStatus.postValue(LinphoneUtils.callStateToString(currentCall.state))
@@ -157,19 +193,19 @@ class MainViewModel @UiThread constructor() : ViewModel() {
                     val contact = coreContext.contactsManager.findContactByAddress(
                         firstCall.remoteAddress
                     )
-                    callsLabel.postValue(
+                    callLabel.postValue(
                         contact?.name ?: LinphoneUtils.getDisplayName(firstCall.remoteAddress)
                     )
                     callsStatus.postValue(LinphoneUtils.callStateToString(firstCall.state))
                 }
             }
         } else {
-            callsLabel.postValue(
+            callLabel.postValue(
                 AppUtils.getFormattedString(R.string.calls_count_label, core.callsNb)
             )
             callsStatus.postValue("") // TODO: improve ?
         }
         Log.i("$TAG At least a call, asking fragment to change status bar color")
-        changeSystemTopBarColorToInCallEvent.postValue(Event(true))
+        changeSystemTopBarColorEvent.postValue(Event(IN_CALL))
     }
 }
diff --git a/app/src/main/res/layout/call_list_cell.xml b/app/src/main/res/layout/call_list_cell.xml
index 59afaa7e7..11e00f12a 100644
--- a/app/src/main/res/layout/call_list_cell.xml
+++ b/app/src/main/res/layout/call_list_cell.xml
@@ -85,10 +85,12 @@
             app:layout_constraintBottom_toBottomOf="parent"/>
 
         <View
+            android:id="@+id/separator"
             android:layout_width="0dp"
             android:layout_height="1dp"
             android:layout_marginEnd="10dp"
             android:background="@color/gray_main2_200"
+            android:visibility="gone"
             app:layout_constraintStart_toStartOf="@id/name"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintBottom_toBottomOf="parent"/>
diff --git a/app/src/main/res/layout/chat_list_cell.xml b/app/src/main/res/layout/chat_list_cell.xml
index d3cd23f7b..971cd8a1a 100644
--- a/app/src/main/res/layout/chat_list_cell.xml
+++ b/app/src/main/res/layout/chat_list_cell.xml
@@ -185,6 +185,7 @@
             android:layout_width="0dp"
             android:layout_height="1dp"
             android:layout_marginEnd="10dp"
+            android:visibility="gone"
             android:background="@color/gray_main2_200"
             app:layout_constraintStart_toStartOf="@id/name"
             app:layout_constraintEnd_toEndOf="parent"
diff --git a/app/src/main/res/layout/contact_list_cell.xml b/app/src/main/res/layout/contact_list_cell.xml
index 566b70670..e53fad32a 100644
--- a/app/src/main/res/layout/contact_list_cell.xml
+++ b/app/src/main/res/layout/contact_list_cell.xml
@@ -107,10 +107,12 @@
             app:layout_constraintBottom_toBottomOf="parent"/>
 
         <View
+            android:id="@+id/separator"
             android:layout_width="0dp"
             android:layout_height="1dp"
             android:layout_marginEnd="10dp"
             android:background="@color/gray_main2_200"
+            android:visibility="gone"
             app:layout_constraintStart_toStartOf="@id/name"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintBottom_toBottomOf="parent"/>
diff --git a/app/src/main/res/layout/history_list_cell.xml b/app/src/main/res/layout/history_list_cell.xml
index 99b5a10f0..90318ea80 100644
--- a/app/src/main/res/layout/history_list_cell.xml
+++ b/app/src/main/res/layout/history_list_cell.xml
@@ -127,6 +127,7 @@
             android:layout_height="1dp"
             android:layout_marginEnd="10dp"
             android:background="@color/gray_main2_200"
+            android:visibility="gone"
             app:layout_constraintStart_toStartOf="@id/name"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintBottom_toBottomOf="parent"/>
diff --git a/app/src/main/res/layout/main_activity.xml b/app/src/main/res/layout/main_activity.xml
index 49b87b934..bffb3243e 100644
--- a/app/src/main/res/layout/main_activity.xml
+++ b/app/src/main/res/layout/main_activity.xml
@@ -27,7 +27,7 @@
                 layout="@layout/main_activity_in_call_top_bar"
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
-                android:visibility="@{viewModel.atLastOneCall ? View.VISIBLE : View.GONE, default=gone}"
+                android:visibility="@{viewModel.showTopBar ? View.VISIBLE : View.GONE, default=gone}"
                 app:viewModel="@{viewModel}"
                 app:layout_constraintTop_toTopOf="parent"
                 app:layout_constraintStart_toStartOf="parent"
diff --git a/app/src/main/res/layout/main_activity_in_call_top_bar.xml b/app/src/main/res/layout/main_activity_in_call_top_bar.xml
index 33f063046..175bc9637 100644
--- a/app/src/main/res/layout/main_activity_in_call_top_bar.xml
+++ b/app/src/main/res/layout/main_activity_in_call_top_bar.xml
@@ -13,8 +13,32 @@
     <androidx.constraintlayout.widget.ConstraintLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:background="@color/green_success_500"
-        android:onClick="@{() -> viewModel.goBackToCall()}">
+        android:background="@{viewModel.atLeastOneCall ? @color/green_success_500 : @color/red_danger_500, default=@color/red_danger_500}"
+        android:onClick="@{() -> viewModel.onTopBarClicked()}">
+
+        <androidx.appcompat.widget.AppCompatTextView
+            style="@style/default_text_style_300"
+            android:id="@+id/error_label"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="16dp"
+            android:layout_marginEnd="10dp"
+            android:layout_marginTop="5dp"
+            android:layout_marginBottom="5dp"
+            android:gravity="center_vertical"
+            android:text="@string/connection_error_for_non_default_account"
+            android:textColor="@color/white"
+            android:textSize="16sp"
+            android:maxLines="1"
+            android:ellipsize="end"
+            android:drawableStart="@drawable/bell_simple"
+            android:drawablePadding="10dp"
+            android:drawableTint="@color/white"
+            android:visibility="@{viewModel.atLeastOneCall ? View.GONE : View.VISIBLE}"
+            app:layout_constraintEnd_toStartOf="@id/close_notif"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintBottom_toBottomOf="parent"/>
 
         <androidx.appcompat.widget.AppCompatTextView
             style="@style/default_text_style_800"
@@ -26,12 +50,15 @@
             android:layout_marginTop="5dp"
             android:layout_marginBottom="5dp"
             android:gravity="center_vertical"
-            android:text="@{viewModel.callsLabel, default=`John Doe`}"
+            android:text="@{viewModel.callLabel, default=`John Doe`}"
             android:textColor="@color/white"
             android:textSize="16sp"
+            android:maxLines="1"
+            android:ellipsize="end"
             android:drawableStart="@drawable/phone"
             android:drawablePadding="10dp"
             android:drawableTint="@color/white"
+            android:visibility="@{viewModel.atLeastOneCall ? View.VISIBLE : View.GONE, default=gone}"
             app:layout_constraintEnd_toStartOf="@id/call_time"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toTopOf="parent"
@@ -47,11 +74,25 @@
             android:text="@{viewModel.callsStatus, default=`Paused`}"
             android:textColor="@color/white"
             android:textSize="14sp"
+            android:visibility="@{viewModel.atLeastOneCall ? View.VISIBLE : View.GONE, default=gone}"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toEndOf="@id/call_display_name"
             app:layout_constraintTop_toTopOf="parent"
             app:layout_constraintBottom_toBottomOf="parent"/>
 
+        <ImageView
+            android:id="@+id/close_notif"
+            android:onClick="@{() -> viewModel.closeTopBar()}"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginEnd="16dp"
+            android:src="@drawable/x"
+            app:tint="@color/white"
+            android:visibility="@{viewModel.atLeastOneCall ? View.GONE : View.VISIBLE}"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintBottom_toBottomOf="parent"/>
+
     </androidx.constraintlayout.widget.ConstraintLayout>
 
 </layout>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index d9a67caf0..a3cf026e9 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -355,6 +355,8 @@
     <string name="calls_count_label">%s calls</string>
     <string name="calls_paused_count_label">%s paused calls</string>
 
+    <string name="connection_error_for_non_default_account">Account connection error</string>
+
     <!-- Keep <u></u> in following strings translations! -->
     <string name="welcome_carousel_skip"><u>Skip</u></string>
     <string name="assistant_forgotten_password"><u>Forgotten password?</u></string>