diff --git a/core/java/android/provider/Telephony.java b/core/java/android/provider/Telephony.java
index 1858ddc7f4526..066ba6e8678e9 100644
--- a/core/java/android/provider/Telephony.java
+++ b/core/java/android/provider/Telephony.java
@@ -4117,20 +4117,6 @@ public final class Telephony {
          */
         public static final String CID = "cid";
 
-        /**
-         * Message code. <em>OBSOLETE: merged into SERIAL_NUMBER.</em>
-         * <P>Type: INTEGER</P>
-         * @hide
-         */
-        public static final String V1_MESSAGE_CODE = "message_code";
-
-        /**
-         * Message identifier. <em>OBSOLETE: renamed to SERVICE_CATEGORY.</em>
-         * <P>Type: INTEGER</P>
-         * @hide
-         */
-        public static final String V1_MESSAGE_IDENTIFIER = "message_id";
-
         /**
          * Service category which represents the general topic of the message.
          * <p>
diff --git a/telephony/java/android/telephony/CbGeoUtils.java b/telephony/java/android/telephony/CbGeoUtils.java
index f4ce6e75769ce..ce5e3f38e78b4 100644
--- a/telephony/java/android/telephony/CbGeoUtils.java
+++ b/telephony/java/android/telephony/CbGeoUtils.java
@@ -18,6 +18,7 @@ package android.telephony;
 
 import android.annotation.NonNull;
 import android.annotation.SystemApi;
+import android.os.Build;
 import android.text.TextUtils;
 
 import java.util.ArrayList;
@@ -257,6 +258,15 @@ public class CbGeoUtils {
                 return new Point(x - p.x, y - p.y);
             }
         }
+
+        @Override
+        public String toString() {
+            String str = "Polygon: ";
+            if (Build.IS_DEBUGGABLE) {
+                str += mVertices;
+            }
+            return str;
+        }
     }
 
     /**
@@ -284,6 +294,16 @@ public class CbGeoUtils {
         public boolean contains(LatLng p) {
             return mCenter.distance(p) <= mRadiusMeter;
         }
+
+        @Override
+        public String toString() {
+            String str = "Circle: ";
+            if (Build.IS_DEBUGGABLE) {
+                str += mCenter + ", radius = " + mRadiusMeter;
+            }
+
+            return str;
+        }
     }
 
     /**
diff --git a/telephony/java/android/telephony/SmsCbMessage.java b/telephony/java/android/telephony/SmsCbMessage.java
index c7f952954d5ff..045d1ebb56404 100644
--- a/telephony/java/android/telephony/SmsCbMessage.java
+++ b/telephony/java/android/telephony/SmsCbMessage.java
@@ -533,7 +533,8 @@ public final class SmsCbMessage implements Parcelable {
                 + ", priority=" + mPriority
                 + (mEtwsWarningInfo != null ? (", " + mEtwsWarningInfo.toString()) : "")
                 + (mCmasWarningInfo != null ? (", " + mCmasWarningInfo.toString()) : "")
-                + ", maximumWaitingTime = " + mMaximumWaitTimeSec
+                + ", maximumWaitingTime=" + mMaximumWaitTimeSec
+                + ", received time=" + mReceivedTimeMillis
                 + ", slotIndex = " + mSlotIndex
                 + ", geo=" + (mGeometries != null
                 ? CbGeoUtils.encodeGeometriesToString(mGeometries) : "null")
diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index f789d1930bf12..da1a9938935ff 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -2378,6 +2378,8 @@ public class TelephonyManager {
      *
      * @return the lowercase 2 character ISO-3166 country code, or empty string if not available.
      *
+     * @throws IllegalArgumentException when the slotIndex is invalid.
+     *
      * {@hide}
      */
     @SystemApi
@@ -2385,6 +2387,10 @@ public class TelephonyManager {
     @NonNull
     public String getNetworkCountryIso(int slotIndex) {
         try {
+            if (!SubscriptionManager.isValidSlotIndex(slotIndex)) {
+                throw new IllegalArgumentException("invalid slot index " + slotIndex);
+            }
+
             ITelephony telephony = getITelephony();
             if (telephony == null) return "";
             return telephony.getNetworkCountryIsoForPhone(slotIndex);