diff --git a/api/current.txt b/api/current.txt
index 2b85c68f21fb1..1b372935cf35e 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -30624,10 +30624,14 @@ package android.telephony {
     field public static final java.lang.String KEY_CARRIER_VOLTE_PROVISIONED_BOOL = "carrier_volte_provisioned_bool";
     field public static final java.lang.String KEY_CARRIER_VOLTE_TTY_SUPPORTED_BOOL = "carrier_volte_tty_supported_bool";
     field public static final java.lang.String KEY_CARRIER_WFC_IMS_AVAILABLE_BOOL = "carrier_wfc_ims_available_bool";
+    field public static final java.lang.String KEY_CDMA_NONROAMING_NETWORKS_STRING_ARRAY = "cdma_nonroaming_networks_string_array";
+    field public static final java.lang.String KEY_CDMA_ROAMING_NETWORKS_STRING_ARRAY = "cdma_roaming_networks_string_array";
     field public static final java.lang.String KEY_DEFAULT_SIM_CALL_MANAGER_STRING = "default_sim_call_manager_string";
     field public static final java.lang.String KEY_DISABLE_CDMA_ACTIVATION_CODE_BOOL = "disable_cdma_activation_code_bool";
     field public static final java.lang.String KEY_DTMF_TYPE_ENABLED_BOOL = "dtmf_type_enabled_bool";
     field public static final java.lang.String KEY_ENABLE_DIALER_KEY_VIBRATION_BOOL = "enable_dialer_vibration_bool";
+    field public static final java.lang.String KEY_GSM_NONROAMING_NETWORKS_STRING_ARRAY = "gsm_nonroaming_networks_string_array";
+    field public static final java.lang.String KEY_GSM_ROAMING_NETWORKS_STRING_ARRAY = "gsm_roaming_networks_string_array";
     field public static final java.lang.String KEY_HAS_IN_CALL_NOISE_SUPPRESSION_BOOL = "has_in_call_noise_suppression_bool";
     field public static final java.lang.String KEY_HIDE_CARRIER_NETWORK_SETTINGS_BOOL = "hide_carrier_network_settings_bool";
     field public static final java.lang.String KEY_HIDE_SIM_LOCK_SETTINGS_BOOL = "hide_sim_lock_settings_bool";
diff --git a/api/system-current.txt b/api/system-current.txt
index a275b8f75b2b1..7e78a6bc67d5c 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -32844,10 +32844,14 @@ package android.telephony {
     field public static final java.lang.String KEY_CARRIER_VOLTE_PROVISIONED_BOOL = "carrier_volte_provisioned_bool";
     field public static final java.lang.String KEY_CARRIER_VOLTE_TTY_SUPPORTED_BOOL = "carrier_volte_tty_supported_bool";
     field public static final java.lang.String KEY_CARRIER_WFC_IMS_AVAILABLE_BOOL = "carrier_wfc_ims_available_bool";
+    field public static final java.lang.String KEY_CDMA_NONROAMING_NETWORKS_STRING_ARRAY = "cdma_nonroaming_networks_string_array";
+    field public static final java.lang.String KEY_CDMA_ROAMING_NETWORKS_STRING_ARRAY = "cdma_roaming_networks_string_array";
     field public static final java.lang.String KEY_DEFAULT_SIM_CALL_MANAGER_STRING = "default_sim_call_manager_string";
     field public static final java.lang.String KEY_DISABLE_CDMA_ACTIVATION_CODE_BOOL = "disable_cdma_activation_code_bool";
     field public static final java.lang.String KEY_DTMF_TYPE_ENABLED_BOOL = "dtmf_type_enabled_bool";
     field public static final java.lang.String KEY_ENABLE_DIALER_KEY_VIBRATION_BOOL = "enable_dialer_vibration_bool";
+    field public static final java.lang.String KEY_GSM_NONROAMING_NETWORKS_STRING_ARRAY = "gsm_nonroaming_networks_string_array";
+    field public static final java.lang.String KEY_GSM_ROAMING_NETWORKS_STRING_ARRAY = "gsm_roaming_networks_string_array";
     field public static final java.lang.String KEY_HAS_IN_CALL_NOISE_SUPPRESSION_BOOL = "has_in_call_noise_suppression_bool";
     field public static final java.lang.String KEY_HIDE_CARRIER_NETWORK_SETTINGS_BOOL = "hide_carrier_network_settings_bool";
     field public static final java.lang.String KEY_HIDE_SIM_LOCK_SETTINGS_BOOL = "hide_sim_lock_settings_bool";
diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java
index 3f78497eef786..0eb94b8c1e304 100644
--- a/telephony/java/android/telephony/CarrierConfigManager.java
+++ b/telephony/java/android/telephony/CarrierConfigManager.java
@@ -182,6 +182,34 @@ public class CarrierConfigManager {
     public static final String
             KEY_DISABLE_CDMA_ACTIVATION_CODE_BOOL = "disable_cdma_activation_code_bool";
 
+   /**
+     * Override the platform's notion of a network operator being considered roaming.
+     * Value is string array of MCCMNCs to be considered roaming for 3GPP RATs.
+     */
+    public static final String
+            KEY_GSM_ROAMING_NETWORKS_STRING_ARRAY = "gsm_roaming_networks_string_array";
+
+    /**
+     * Override the platform's notion of a network operator being considered not roaming.
+     * Value is string array of MCCMNCs to be considered not roaming for 3GPP RATs.
+     */
+    public static final String
+            KEY_GSM_NONROAMING_NETWORKS_STRING_ARRAY = "gsm_nonroaming_networks_string_array";
+
+    /**
+     * Override the platform's notion of a network operator being considered roaming.
+     * Value is string array of SIDs to be considered roaming for 3GPP2 RATs.
+     */
+    public static final String
+            KEY_CDMA_ROAMING_NETWORKS_STRING_ARRAY = "cdma_roaming_networks_string_array";
+
+    /**
+     * Override the platform's notion of a network operator being considered non roaming.
+     * Value is string array of SIDs to be considered not roaming for 3GPP2 RATs.
+     */
+    public static final String
+            KEY_CDMA_NONROAMING_NETWORKS_STRING_ARRAY = "cdma_nonroaming_networks_string_array";
+
     /**
      * Flag specifying whether VoLTE should be available for carrier, independent of carrier
      * provisioning. If false: hard disabled. If true: then depends on carrier provisioning,
@@ -358,6 +386,11 @@ public class CarrierConfigManager {
         sDefaults.putString(KEY_CI_ACTION_ON_SYS_UPDATE_EXTRA_STRING, "");
         sDefaults.putString(KEY_CI_ACTION_ON_SYS_UPDATE_EXTRA_VAL_STRING, "");
 
+        sDefaults.putStringArray(KEY_GSM_ROAMING_NETWORKS_STRING_ARRAY, null);
+        sDefaults.putStringArray(KEY_GSM_NONROAMING_NETWORKS_STRING_ARRAY, null);
+        sDefaults.putStringArray(KEY_CDMA_ROAMING_NETWORKS_STRING_ARRAY, null);
+        sDefaults.putStringArray(KEY_CDMA_NONROAMING_NETWORKS_STRING_ARRAY, null);
+
         // MMS defaults
         sDefaults.putBoolean(KEY_MMS_ALIAS_ENABLED_BOOL, false);
         sDefaults.putBoolean(KEY_MMS_ALLOW_ATTACH_AUDIO_BOOL, true);