diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index 5b7adf01ec8f6..efec47139cdde 100644
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -8743,6 +8743,17 @@ public final class Settings {
         @SystemApi
         public static final String EUICC_PROVISIONED = "euicc_provisioned";
 
+        /**
+         * List of ISO country codes in which eUICC UI is shown. Country codes should be separated
+         * by comma.
+         *
+         * <p>Used to hide eUICC UI from users who are currently in countries no carriers support
+         * eUICC.
+         * @hide
+         */
+        //TODO(b/77914569) Changes this to System Api.
+        public static final String EUICC_SUPPORTED_COUNTRIES = "euicc_supported_countries";
+
         /**
          * Whether any activity can be resized. When this is true, any
          * activity, regardless of manifest values, can be resized for multi-window.
diff --git a/core/tests/coretests/src/android/provider/SettingsBackupTest.java b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
index 558e576b71aff..196f8de656f07 100644
--- a/core/tests/coretests/src/android/provider/SettingsBackupTest.java
+++ b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
@@ -228,6 +228,7 @@ public class SettingsBackupTest {
                     Settings.Global.EPHEMERAL_COOKIE_MAX_SIZE_BYTES,
                     Settings.Global.ERROR_LOGCAT_PREFIX,
                     Settings.Global.EUICC_PROVISIONED,
+                    Settings.Global.EUICC_SUPPORTED_COUNTRIES,
                     Settings.Global.EUICC_FACTORY_RESET_TIMEOUT_MILLIS,
                     Settings.Global.FANCY_IME_ANIMATIONS,
                     Settings.Global.FORCE_ALLOW_ON_EXTERNAL,