diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index a984b7d..1c29db1 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -1559,6 +1559,16 @@
 }
 
 flag {
+   name: "hide_ringer_button_in_single_volume_mode"
+   namespace: "systemui"
+   description: "When the device is in single volume mode, hide the ringer button because it doesn't work"
+   bug: "374870615"
+   metadata {
+       purpose: PURPOSE_BUGFIX
+   }
+}
+
+flag {
     name: "qs_tile_detailed_view"
     namespace: "systemui"
     description: "Enables the tile detailed view UI."
diff --git a/packages/SystemUI/src/com/android/systemui/volume/VolumeDialogImpl.java b/packages/SystemUI/src/com/android/systemui/volume/VolumeDialogImpl.java
index 3d2ebf2..07509e6 100644
--- a/packages/SystemUI/src/com/android/systemui/volume/VolumeDialogImpl.java
+++ b/packages/SystemUI/src/com/android/systemui/volume/VolumeDialogImpl.java
@@ -64,6 +64,8 @@
 import android.graphics.drawable.Drawable;
 import android.graphics.drawable.LayerDrawable;
 import android.graphics.drawable.RotateDrawable;
+import android.graphics.drawable.ShapeDrawable;
+import android.graphics.drawable.shapes.RoundRectShape;
 import android.media.AudioManager;
 import android.media.AudioSystem;
 import android.os.Debug;
@@ -115,6 +117,7 @@
 import com.android.internal.view.RotationPolicy;
 import com.android.settingslib.Utils;
 import com.android.systemui.Dumpable;
+import com.android.systemui.Flags;
 import com.android.systemui.Prefs;
 import com.android.systemui.dump.DumpManager;
 import com.android.systemui.haptics.slider.HapticSliderViewBinder;
@@ -656,6 +659,11 @@
             mRingerIcon = mRinger.findViewById(R.id.ringer_icon);
         }
 
+        if (Flags.hideRingerButtonInSingleVolumeMode() && AudioSystem.isSingleVolume(mContext)) {
+            mRingerAndDrawerContainer.setVisibility(INVISIBLE);
+            mRinger.setVisibility(INVISIBLE);
+        }
+
         mSelectedRingerIcon = mDialog.findViewById(R.id.volume_new_ringer_active_icon);
         mSelectedRingerContainer = mDialog.findViewById(
                 R.id.volume_new_ringer_active_icon_container);
@@ -2341,10 +2349,31 @@
             return;
         }
 
-        final ColorDrawable solidDrawable = new ColorDrawable(
+        LayerDrawable background;
+        // mRingerAndDrawerContainer has rounded corner.
+        // But when it's not visible, mTopContainer needs to have rounded corner.
+        if (Flags.hideRingerButtonInSingleVolumeMode()
+                && mRingerAndDrawerContainer.getVisibility() != VISIBLE
+        ) {
+            float[] radius = new float[] {
+                mDialogCornerRadius, mDialogCornerRadius,  // Top-left corner
+                mDialogCornerRadius, mDialogCornerRadius,  // Top-right corner
+                0, 0,  // Bottom-right corner
+                0, 0   // Bottom-left corner
+            };
+
+            ShapeDrawable roundedDrawable = new ShapeDrawable(
+                    new RoundRectShape(radius, null, null));
+            roundedDrawable.getPaint().setColor(Utils.getColorAttrDefaultColor(
+                    mContext, com.android.internal.R.attr.colorSurface));
+
+            background = new LayerDrawable(new Drawable[] { roundedDrawable });
+        } else {
+            final ColorDrawable solidDrawable = new ColorDrawable(
                 Utils.getColorAttrDefaultColor(mContext, com.android.internal.R.attr.colorSurface));
 
-        final LayerDrawable background = new LayerDrawable(new Drawable[] { solidDrawable });
+            background = new LayerDrawable(new Drawable[] { solidDrawable });
+        }
 
         // Size the solid color to match the primary volume row. In landscape, extend it upwards
         // slightly so that it fills in the bottom corners of the ringer icon, whose background is