diff --git a/auth/lib/l10n/arb/app_en.arb b/auth/lib/l10n/arb/app_en.arb
index b46344f8e82..6b0e95d6509 100644
--- a/auth/lib/l10n/arb/app_en.arb
+++ b/auth/lib/l10n/arb/app_en.arb
@@ -88,6 +88,8 @@
   "useRecoveryKey": "Use recovery key",
   "incorrectPasswordTitle": "Incorrect password",
   "welcomeBack": "Welcome back!",
+  "emailAlreadyRegistered": "Email already registered.",
+  "emailNotRegistered": "Email not registered.",
   "madeWithLoveAtPrefix": "made with ❤️ at ",
   "supportDevs": "Subscribe to <bold-green>ente</bold-green> to support us",
   "supportDiscount": "Use coupon code \"AUTH\" to get 10% off first year",
diff --git a/auth/lib/services/user_service.dart b/auth/lib/services/user_service.dart
index 7afb7a4c6e1..222f8d5d628 100644
--- a/auth/lib/services/user_service.dart
+++ b/auth/lib/services/user_service.dart
@@ -109,7 +109,24 @@ class UserService {
     } on DioException catch (e) {
       await dialog.hide();
       _logger.info(e);
-      if (e.response != null && e.response!.statusCode == 403) {
+      final String? enteErrCode = e.response?.data["code"];
+      if (enteErrCode != null && enteErrCode == "USER_ALREADY_REGISTERED") {
+        unawaited(
+          showErrorDialog(
+            context,
+            context.l10n.oops,
+            context.l10n.emailAlreadyRegistered,
+          ),
+        );
+      } else if (enteErrCode != null && enteErrCode == "USER_NOT_REGISTERED") {
+        unawaited(
+          showErrorDialog(
+            context,
+            context.l10n.oops,
+            context.l10n.emailNotRegistered,
+          ),
+        );
+      } else if (e.response != null && e.response!.statusCode == 403) {
         unawaited(
           showErrorDialog(
             context,
diff --git a/mobile/lib/generated/intl/messages_en.dart b/mobile/lib/generated/intl/messages_en.dart
index 2176fdc967b..af94f25dcb7 100644
--- a/mobile/lib/generated/intl/messages_en.dart
+++ b/mobile/lib/generated/intl/messages_en.dart
@@ -790,8 +790,12 @@ class MessageLookup extends MessageLookupByLibrary {
                 "Edits to location will only be seen within Ente"),
         "eligible": MessageLookupByLibrary.simpleMessage("eligible"),
         "email": MessageLookupByLibrary.simpleMessage("Email"),
+        "emailAlreadyRegistered":
+            MessageLookupByLibrary.simpleMessage("Email already registered."),
         "emailChangedTo": m30,
         "emailNoEnteAccount": m31,
+        "emailNotRegistered":
+            MessageLookupByLibrary.simpleMessage("Email not registered."),
         "emailVerificationToggle":
             MessageLookupByLibrary.simpleMessage("Email verification"),
         "emailYourLogs":
diff --git a/mobile/lib/generated/l10n.dart b/mobile/lib/generated/l10n.dart
index 9d93c4328f5..85cfa79c986 100644
--- a/mobile/lib/generated/l10n.dart
+++ b/mobile/lib/generated/l10n.dart
@@ -70,6 +70,26 @@ class S {
     );
   }
 
+  /// `Email already registered.`
+  String get emailAlreadyRegistered {
+    return Intl.message(
+      'Email already registered.',
+      name: 'emailAlreadyRegistered',
+      desc: '',
+      args: [],
+    );
+  }
+
+  /// `Email not registered.`
+  String get emailNotRegistered {
+    return Intl.message(
+      'Email not registered.',
+      name: 'emailNotRegistered',
+      desc: '',
+      args: [],
+    );
+  }
+
   /// `Email`
   String get email {
     return Intl.message(
diff --git a/mobile/lib/l10n/intl_en.arb b/mobile/lib/l10n/intl_en.arb
index c44cd20753c..345ab541692 100644
--- a/mobile/lib/l10n/intl_en.arb
+++ b/mobile/lib/l10n/intl_en.arb
@@ -2,6 +2,8 @@
   "@@locale ": "en",
   "enterYourEmailAddress": "Enter your email address",
   "accountWelcomeBack": "Welcome back!",
+  "emailAlreadyRegistered": "Email already registered.",
+  "emailNotRegistered": "Email not registered.",
   "email": "Email",
   "cancel": "Cancel",
   "verify": "Verify",
diff --git a/mobile/lib/services/user_service.dart b/mobile/lib/services/user_service.dart
index e13cc3e58af..9286af90f6c 100644
--- a/mobile/lib/services/user_service.dart
+++ b/mobile/lib/services/user_service.dart
@@ -124,7 +124,24 @@ class UserService {
     } on DioError catch (e) {
       await dialog.hide();
       _logger.info(e);
-      if (e.response != null && e.response!.statusCode == 403) {
+      final String? enteErrCode = e.response?.data["code"];
+      if (enteErrCode != null && enteErrCode == "USER_ALREADY_REGISTERED") {
+        unawaited(
+          showErrorDialog(
+            context,
+            context.l10n.oops,
+            context.l10n.emailAlreadyRegistered,
+          ),
+        );
+      } else if (enteErrCode != null && enteErrCode == "USER_NOT_REGISTERED") {
+        unawaited(
+          showErrorDialog(
+            context,
+            context.l10n.oops,
+            context.l10n.emailNotRegistered,
+          ),
+        );
+      } else if (e.response != null && e.response!.statusCode == 403) {
         unawaited(
           showErrorDialog(
             context,