diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index fbc70de598021..a47f5e9d0a447 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -4580,4 +4580,18 @@ public class TelephonyManager {
         } catch (RemoteException e) {
         }
     }
+
+
+    /** @hide */
+    public String getLocaleFromDefaultSim() {
+        try {
+            final ITelephony telephony = getITelephony();
+            if (telephony != null) {
+                return telephony.getLocaleFromDefaultSim();
+            }
+        } catch (RemoteException ex) {
+        }
+
+        return null;
+    }
 }
diff --git a/telephony/java/com/android/internal/telephony/ITelephony.aidl b/telephony/java/com/android/internal/telephony/ITelephony.aidl
index 25fe97c1bee0d..11d0ea6db74c0 100644
--- a/telephony/java/com/android/internal/telephony/ITelephony.aidl
+++ b/telephony/java/com/android/internal/telephony/ITelephony.aidl
@@ -945,4 +945,12 @@ interface ITelephony {
     int getSubIdForPhoneAccount(in PhoneAccount phoneAccount);
 
     void factoryReset(int subId);
+
+    /**
+     * An estimate of the users's current locale based on the default SIM.
+     *
+     * The returned string will be a well formed BCP-47 language tag, or {@code null}
+     * if no locale could be derived.
+     */
+    String getLocaleFromDefaultSim();
 }