diff --git a/core/api/current.txt b/core/api/current.txt
index b983617..6a2e5c1 100644
--- a/core/api/current.txt
+++ b/core/api/current.txt
@@ -34292,6 +34292,7 @@
     field public static final int PRESENTATION_ALLOWED = 1; // 0x1
     field public static final int PRESENTATION_PAYPHONE = 4; // 0x4
     field public static final int PRESENTATION_RESTRICTED = 2; // 0x2
+    field public static final int PRESENTATION_UNAVAILABLE = 5; // 0x5
     field public static final int PRESENTATION_UNKNOWN = 3; // 0x3
     field public static final String PRIORITY = "priority";
     field public static final int PRIORITY_NORMAL = 0; // 0x0
@@ -41065,6 +41066,7 @@
     field public static final int PRESENTATION_ALLOWED = 1; // 0x1
     field public static final int PRESENTATION_PAYPHONE = 4; // 0x4
     field public static final int PRESENTATION_RESTRICTED = 2; // 0x2
+    field public static final int PRESENTATION_UNAVAILABLE = 5; // 0x5
     field public static final int PRESENTATION_UNKNOWN = 3; // 0x3
     field public static final int PRIORITY_NORMAL = 0; // 0x0
     field public static final int PRIORITY_URGENT = 1; // 0x1
diff --git a/core/api/system-current.txt b/core/api/system-current.txt
index 30154c8..1f96a24 100644
--- a/core/api/system-current.txt
+++ b/core/api/system-current.txt
@@ -13785,6 +13785,7 @@
     field public static final int OIR_PRESENTATION_NOT_RESTRICTED = 2; // 0x2
     field public static final int OIR_PRESENTATION_PAYPHONE = 4; // 0x4
     field public static final int OIR_PRESENTATION_RESTRICTED = 1; // 0x1
+    field public static final int OIR_PRESENTATION_UNAVAILABLE = 5; // 0x5
     field public static final int OIR_PRESENTATION_UNKNOWN = 3; // 0x3
     field public static final int PRIORITY_NORMAL = 0; // 0x0
     field public static final int PRIORITY_URGENT = 1; // 0x1
diff --git a/core/java/android/provider/BlockedNumberContract.java b/core/java/android/provider/BlockedNumberContract.java
index dd2ea81..5d00b29 100644
--- a/core/java/android/provider/BlockedNumberContract.java
+++ b/core/java/android/provider/BlockedNumberContract.java
@@ -231,7 +231,7 @@
             prefix = { "STATUS_" },
             value = {STATUS_NOT_BLOCKED, STATUS_BLOCKED_IN_LIST, STATUS_BLOCKED_RESTRICTED,
                     STATUS_BLOCKED_UNKNOWN_NUMBER, STATUS_BLOCKED_PAYPHONE,
-                    STATUS_BLOCKED_NOT_IN_CONTACTS})
+                    STATUS_BLOCKED_NOT_IN_CONTACTS, STATUS_BLOCKED_UNAVAILABLE})
     public @interface BlockStatus {}
 
     /**
@@ -277,6 +277,13 @@
     public static final int STATUS_BLOCKED_NOT_IN_CONTACTS = 5;
 
     /**
+     * Integer reason code used with {@link #RES_BLOCK_STATUS} to indicate that a call was blocked
+     * because it is from a number not available.
+     * @hide
+     */
+    public static final int STATUS_BLOCKED_UNAVAILABLE = 6;
+
+    /**
      * Integer reason indicating whether a call was blocked, and if so why.
      * @hide
      */
@@ -441,6 +448,9 @@
         /* Preference key for whether should show an emergency call notification. */
         public static final String ENHANCED_SETTING_KEY_SHOW_EMERGENCY_CALL_NOTIFICATION =
                 "show_emergency_call_notification";
+        /* Preference key of block unavailable calls setting. */
+        public static final String ENHANCED_SETTING_KEY_BLOCK_UNAVAILABLE =
+                "block_unavailable_calls_setting";
 
         /**
          * Notifies the provider that emergency services were contacted by the user.
@@ -547,6 +557,7 @@
          *        {@link #ENHANCED_SETTING_KEY_BLOCK_PRIVATE}
          *        {@link #ENHANCED_SETTING_KEY_BLOCK_PAYPHONE}
          *        {@link #ENHANCED_SETTING_KEY_BLOCK_UNKNOWN}
+         *        {@link #ENHANCED_SETTING_KEY_BLOCK_UNAVAILABLE}
          *        {@link #ENHANCED_SETTING_KEY_EMERGENCY_CALL_NOTIFICATION_SHOWING}
          * @return {@code true} if the setting is enabled. {@code false} otherwise.
          */
@@ -574,6 +585,7 @@
          *        {@link #ENHANCED_SETTING_KEY_BLOCK_PRIVATE}
          *        {@link #ENHANCED_SETTING_KEY_BLOCK_PAYPHONE}
          *        {@link #ENHANCED_SETTING_KEY_BLOCK_UNKNOWN}
+         *        {@link #ENHANCED_SETTING_KEY_BLOCK_UNAVAILABLE}
          *        {@link #ENHANCED_SETTING_KEY_EMERGENCY_CALL_NOTIFICATION_SHOWING}
          * @param value the enabled statue of the setting to set.
          */
@@ -603,6 +615,8 @@
                     return "blocked - payphone";
                 case STATUS_BLOCKED_NOT_IN_CONTACTS:
                     return "blocked - not in contacts";
+                case STATUS_BLOCKED_UNAVAILABLE:
+                    return "blocked - unavailable";
             }
             return "unknown";
         }
diff --git a/core/java/android/provider/CallLog.java b/core/java/android/provider/CallLog.java
index 0cc5bfd..8dca7ab 100644
--- a/core/java/android/provider/CallLog.java
+++ b/core/java/android/provider/CallLog.java
@@ -910,6 +910,7 @@
          * <li>{@link #PRESENTATION_RESTRICTED}</li>
          * <li>{@link #PRESENTATION_UNKNOWN}</li>
          * <li>{@link #PRESENTATION_PAYPHONE}</li>
+         * <li>{@link #PRESENTATION_UNAVAILABLE}</li>
          * </ul>
          * </p>
          *
@@ -925,6 +926,8 @@
         public static final int PRESENTATION_UNKNOWN = 3;
         /** Number is a pay phone. */
         public static final int PRESENTATION_PAYPHONE = 4;
+        /** Number is unavailable. */
+        public static final int PRESENTATION_UNAVAILABLE = 5;
 
         /**
          * The ISO 3166-1 two letters country code of the country where the
@@ -2028,6 +2031,10 @@
                 return presentation;
             }
 
+            if (presentation == TelecomManager.PRESENTATION_UNAVAILABLE) {
+                return PRESENTATION_UNAVAILABLE;
+            }
+
             if (TextUtils.isEmpty(number)
                     || presentation == TelecomManager.PRESENTATION_UNKNOWN) {
                 return PRESENTATION_UNKNOWN;
diff --git a/telecomm/java/android/telecom/CallScreeningService.java b/telecomm/java/android/telecom/CallScreeningService.java
index 7861b11..37b4e65 100644
--- a/telecomm/java/android/telecom/CallScreeningService.java
+++ b/telecomm/java/android/telecom/CallScreeningService.java
@@ -632,8 +632,9 @@
      * post-dial digits are passed.
      * <p>
      * Calls with a {@link Call.Details#getHandlePresentation()} of
-     * {@link TelecomManager#PRESENTATION_RESTRICTED}, {@link TelecomManager#PRESENTATION_UNKNOWN}
-     * or {@link TelecomManager#PRESENTATION_PAYPHONE} presentation are not provided to the
+     * {@link TelecomManager#PRESENTATION_RESTRICTED}, {@link TelecomManager#PRESENTATION_UNKNOWN},
+     * {@link TelecomManager#PRESENTATION_UNAVAILABLE} or
+     * {@link TelecomManager#PRESENTATION_PAYPHONE} presentation are not provided to the
      * {@link CallScreeningService}.
      *
      * @param callDetails Information about a new call, see {@link Call.Details}.
diff --git a/telecomm/java/android/telecom/TelecomManager.java b/telecomm/java/android/telecom/TelecomManager.java
index 0dc899e..6279bf8 100644
--- a/telecomm/java/android/telecom/TelecomManager.java
+++ b/telecomm/java/android/telecom/TelecomManager.java
@@ -990,6 +990,11 @@
      */
     public static final int PRESENTATION_PAYPHONE = 4;
 
+    /**
+     * Indicates that the address or number of a call is unavailable.
+     */
+    public static final int PRESENTATION_UNAVAILABLE = 5;
+
 
     /*
      * Values for the adb property "persist.radio.videocall.audio.output"
@@ -1006,7 +1011,7 @@
     @IntDef(
             prefix = { "PRESENTATION_" },
             value = {PRESENTATION_ALLOWED, PRESENTATION_RESTRICTED, PRESENTATION_UNKNOWN,
-            PRESENTATION_PAYPHONE})
+            PRESENTATION_PAYPHONE, PRESENTATION_UNAVAILABLE})
     public @interface Presentation {}
 
 
diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java
index cd399c0..8e55f75 100644
--- a/telephony/java/android/telephony/CarrierConfigManager.java
+++ b/telephony/java/android/telephony/CarrierConfigManager.java
@@ -2273,6 +2273,7 @@
      * android.provider.BlockedNumberContract.SystemContract#ENHANCED_SETTING_KEY_BLOCK_PRIVATE
      * android.provider.BlockedNumberContract.SystemContract#ENHANCED_SETTING_KEY_BLOCK_PAYPHONE
      * android.provider.BlockedNumberContract.SystemContract#ENHANCED_SETTING_KEY_BLOCK_UNKNOWN
+     * android.provider.BlockedNumberContract.SystemContract#ENHANCED_SETTING_KEY_BLOCK_UNAVAILABLE
      *
      * <p>
      * 1. For Single SIM(SS) device, it can be customized in both carrier_config_mccmnc.xml
diff --git a/telephony/java/android/telephony/ims/ImsCallProfile.java b/telephony/java/android/telephony/ims/ImsCallProfile.java
index 93e1058..7e2d80e 100644
--- a/telephony/java/android/telephony/ims/ImsCallProfile.java
+++ b/telephony/java/android/telephony/ims/ImsCallProfile.java
@@ -317,6 +317,10 @@
      * Payphone presentation for Originating Identity.
      */
     public static final int OIR_PRESENTATION_PAYPHONE = 4;
+    /**
+     * Unavailable presentation for Originating Identity.
+     */
+    public static final int OIR_PRESENTATION_UNAVAILABLE = 5;
 
     //Values for EXTRA_DIALSTRING
     /**
@@ -989,6 +993,8 @@
                 return ImsCallProfile.OIR_PRESENTATION_PAYPHONE;
             case PhoneConstants.PRESENTATION_UNKNOWN:
                 return ImsCallProfile.OIR_PRESENTATION_UNKNOWN;
+            case PhoneConstants.PRESENTATION_UNAVAILABLE:
+                return ImsCallProfile.OIR_PRESENTATION_UNAVAILABLE;
             default:
                 return ImsCallProfile.OIR_DEFAULT;
         }
@@ -1017,6 +1023,8 @@
                 return PhoneConstants.PRESENTATION_ALLOWED;
             case ImsCallProfile.OIR_PRESENTATION_PAYPHONE:
                 return PhoneConstants.PRESENTATION_PAYPHONE;
+            case ImsCallProfile.OIR_PRESENTATION_UNAVAILABLE:
+                return PhoneConstants.PRESENTATION_UNAVAILABLE;
             case ImsCallProfile.OIR_PRESENTATION_UNKNOWN:
                 return PhoneConstants.PRESENTATION_UNKNOWN;
             default:
diff --git a/telephony/java/com/android/internal/telephony/PhoneConstants.java b/telephony/java/com/android/internal/telephony/PhoneConstants.java
index f650246..813e80e 100644
--- a/telephony/java/com/android/internal/telephony/PhoneConstants.java
+++ b/telephony/java/com/android/internal/telephony/PhoneConstants.java
@@ -95,6 +95,7 @@
     public static final int PRESENTATION_UNKNOWN = 3;    // no specified or unknown by network
     @UnsupportedAppUsage
     public static final int PRESENTATION_PAYPHONE = 4;   // show pay phone info
+    public static final int PRESENTATION_UNAVAILABLE = 5;   // show unavailable
 
     public static final String PHONE_NAME_KEY = "phoneName";
     public static final String DATA_NETWORK_TYPE_KEY = "networkType";