diff --git a/telecomm/java/android/telecom/DisconnectCause.java b/telecomm/java/android/telecom/DisconnectCause.java
index 331caa1..7ad26c9 100644
--- a/telecomm/java/android/telecom/DisconnectCause.java
+++ b/telecomm/java/android/telecom/DisconnectCause.java
@@ -16,7 +16,10 @@
 
 package android.telecom;
 
+import android.annotation.FlaggedApi;
+import android.annotation.NonNull;
 import android.annotation.Nullable;
+import android.annotation.SystemApi;
 import android.media.ToneGenerator;
 import android.os.Parcel;
 import android.os.Parcelable;
@@ -25,6 +28,8 @@
 import android.telephony.ims.ImsReasonInfo;
 import android.text.TextUtils;
 
+import com.android.server.telecom.flags.Flags;
+
 import java.util.Objects;
 
 /**
@@ -169,7 +174,9 @@
     }
 
     /**
-     * Creates a new DisconnectCause instance.
+     * Creates a new DisconnectCause instance. This is used by Telephony to pass in extra debug
+     * info to Telecom regarding the disconnect cause.
+     *
      * @param code The code for the disconnect cause.
      * @param label The localized label to show to the user to explain the disconnect.
      * @param description The localized description to show to the user to explain the disconnect.
@@ -180,7 +187,10 @@
      * @param imsReasonInfo The relevant {@link ImsReasonInfo}, or {@code null} if not available.
      * @hide
      */
-    public DisconnectCause(int code, CharSequence label, CharSequence description, String reason,
+    @SystemApi
+    @FlaggedApi(Flags.FLAG_TELECOM_RESOLVE_HIDDEN_DEPENDENCIES)
+    public DisconnectCause(int code, @NonNull CharSequence label,
+            @NonNull CharSequence description, @NonNull String reason,
             int toneToPlay, @Annotation.DisconnectCauses int telephonyDisconnectCause,
             @Annotation.PreciseDisconnectCauses int telephonyPreciseDisconnectCause,
             @Nullable ImsReasonInfo imsReasonInfo) {
@@ -241,28 +251,40 @@
     }
 
     /**
-     * Returns the telephony {@link android.telephony.DisconnectCause} for the call.
+     * Returns the telephony {@link android.telephony.DisconnectCause} for the call. This is only
+     * used internally by Telecom for providing extra debug information from Telephony.
+     *
      * @return The disconnect cause.
      * @hide
      */
+    @SystemApi
+    @FlaggedApi(Flags.FLAG_TELECOM_RESOLVE_HIDDEN_DEPENDENCIES)
     public @Annotation.DisconnectCauses int getTelephonyDisconnectCause() {
         return mTelephonyDisconnectCause;
     }
 
     /**
-     * Returns the telephony {@link android.telephony.PreciseDisconnectCause} for the call.
+     * Returns the telephony {@link android.telephony.PreciseDisconnectCause} for the call. This is
+     * only used internally by Telecom for providing extra debug information from Telephony.
+     *
      * @return The precise disconnect cause.
      * @hide
      */
+    @SystemApi
+    @FlaggedApi(Flags.FLAG_TELECOM_RESOLVE_HIDDEN_DEPENDENCIES)
     public @Annotation.PreciseDisconnectCauses int getTelephonyPreciseDisconnectCause() {
         return mTelephonyPreciseDisconnectCause;
     }
 
     /**
-     * Returns the telephony {@link ImsReasonInfo} associated with the call disconnection.
+     * Returns the telephony {@link ImsReasonInfo} associated with the call disconnection. This is
+     * only used internally by Telecom for providing extra debug information from Telephony.
+     *
      * @return The {@link ImsReasonInfo} or {@code null} if not known.
      * @hide
      */
+    @SystemApi
+    @FlaggedApi(Flags.FLAG_TELECOM_RESOLVE_HIDDEN_DEPENDENCIES)
     public @Nullable ImsReasonInfo getImsReasonInfo() {
         return mImsReasonInfo;
     }