diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/call/CallSignalingHandler.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/call/CallSignalingHandler.kt
index dbf15d2624..61ea660b60 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/call/CallSignalingHandler.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/call/CallSignalingHandler.kt
@@ -30,7 +30,6 @@ import org.matrix.android.sdk.api.session.room.model.call.CallNegotiateContent
 import org.matrix.android.sdk.api.session.room.model.call.CallRejectContent
 import org.matrix.android.sdk.api.session.room.model.call.CallSelectAnswerContent
 import org.matrix.android.sdk.api.session.room.model.call.CallSignalingContent
-import org.matrix.android.sdk.api.util.Optional
 import org.matrix.android.sdk.internal.di.UserId
 import org.matrix.android.sdk.internal.session.SessionScope
 import timber.log.Timber
diff --git a/newsfragment/3420.feature b/newsfragment/3420.feature
new file mode 100644
index 0000000000..3f3df52f62
--- /dev/null
+++ b/newsfragment/3420.feature
@@ -0,0 +1 @@
+VoIP: support attended transfer
\ No newline at end of file
diff --git a/vector/src/main/java/im/vector/app/features/call/VectorCallActivity.kt b/vector/src/main/java/im/vector/app/features/call/VectorCallActivity.kt
index 0233fdf3e8..d8f183a94a 100644
--- a/vector/src/main/java/im/vector/app/features/call/VectorCallActivity.kt
+++ b/vector/src/main/java/im/vector/app/features/call/VectorCallActivity.kt
@@ -198,14 +198,13 @@ class VectorCallActivity : VectorBaseActivity<ActivityCallBinding>(), CallContro
             }
             is CallState.Connected -> {
                 if (callState.iceConnectionState == MxPeerConnectionState.CONNECTED) {
-                    if(state.transfereeName.hasValue()){
+                    if (state.transfereeName.hasValue()) {
                         views.callActionText.text = getString(R.string.call_transfer_transfer_to_title, state.transfereeName.get())
                         views.callActionText.isVisible = true
                         views.callActionText.setOnClickListener { callViewModel.handle(VectorCallViewActions.TransferCall) }
                         views.callStatusText.text = state.formattedDuration
                         configureCallInfo(state)
-                    }
-                    else if (state.isLocalOnHold || state.isRemoteOnHold) {
+                    } else if (state.isLocalOnHold || state.isRemoteOnHold) {
                         views.smallIsHeldIcon.isVisible = true
                         views.callVideoGroup.isInvisible = true
                         views.callInfoGroup.isVisible = true
@@ -254,9 +253,9 @@ class VectorCallActivity : VectorBaseActivity<ActivityCallBinding>(), CallContro
         state.callInfo.otherUserItem?.let {
             val colorFilter = ContextCompat.getColor(this, R.color.bg_call_screen)
             avatarRenderer.renderBlur(it, views.bgCallView, sampling = 20, rounded = false, colorFilter = colorFilter)
-            if(state.transfereeName.hasValue()) {
+            if (state.transfereeName.hasValue()) {
                 views.participantNameText.text = getString(R.string.call_transfer_consulting_with, it.getBestName())
-            }else {
+            } else {
                 views.participantNameText.text = it.getBestName()
             }
             if (blurAvatar) {
diff --git a/vector/src/main/java/im/vector/app/features/call/VectorCallViewActions.kt b/vector/src/main/java/im/vector/app/features/call/VectorCallViewActions.kt
index 804d272d7f..a332153aaa 100644
--- a/vector/src/main/java/im/vector/app/features/call/VectorCallViewActions.kt
+++ b/vector/src/main/java/im/vector/app/features/call/VectorCallViewActions.kt
@@ -18,7 +18,6 @@ package im.vector.app.features.call
 
 import im.vector.app.core.platform.VectorViewModelAction
 import im.vector.app.features.call.audio.CallAudioManager
-import im.vector.app.features.call.webrtc.WebRtcCall
 
 sealed class VectorCallViewActions : VectorViewModelAction {
     object EndCall : VectorCallViewActions()
diff --git a/vector/src/main/java/im/vector/app/features/call/VectorCallViewModel.kt b/vector/src/main/java/im/vector/app/features/call/VectorCallViewModel.kt
index ddb9629d8f..aed38f9e98 100644
--- a/vector/src/main/java/im/vector/app/features/call/VectorCallViewModel.kt
+++ b/vector/src/main/java/im/vector/app/features/call/VectorCallViewModel.kt
@@ -39,9 +39,7 @@ import org.matrix.android.sdk.api.session.call.CallState
 import org.matrix.android.sdk.api.session.call.MxCall
 import org.matrix.android.sdk.api.session.call.MxPeerConnectionState
 import org.matrix.android.sdk.api.session.room.model.call.supportCallTransfer
-import org.matrix.android.sdk.api.util.MatrixItem
 import org.matrix.android.sdk.api.util.Optional
-import org.matrix.android.sdk.api.util.toMatrixItem
 
 class VectorCallViewModel @AssistedInject constructor(
         @Assisted initialState: VectorCallViewState,