diff --git a/lib/backend/modules/account.dart b/lib/backend/modules/account.dart
index 692f5e6..533750c 100644
--- a/lib/backend/modules/account.dart
+++ b/lib/backend/modules/account.dart
@@ -1454,6 +1454,12 @@ class AccountModule {
       'language': language,
     };
 
+    final callsSeed = _api.callsSeed;
+    final deviceId = _api.deviceId;
+    if (callsSeed != null && deviceId != null) {
+      payload['mode'] = ChatCacheFingerprint.compute(callsSeed, deviceId);
+    }
+
     logger.i('Запрос OTP-кода: phone=${_maskPhone(normalizedPhone)} type=${type.value}');
 
     final packet = await _api.sendRequest(Opcode.authRequest, payload);
diff --git a/lib/core/protocol/chat_cache_fingerprint.dart b/lib/core/protocol/chat_cache_fingerprint.dart
index 15261e5..2387a07 100644
--- a/lib/core/protocol/chat_cache_fingerprint.dart
+++ b/lib/core/protocol/chat_cache_fingerprint.dart
@@ -5,13 +5,13 @@ import 'package:crypto/crypto.dart';
 
 class ChatCacheFingerprint {
   static final Uint8List _signatureDigest = _hex(
-    '2917772b58095daca2a99a099f85ee0214c9a9d72bea2007cbaf5b45f29c8d18',
+    '1684414033eb263e2c615f8b7df5ed8793850a07656304997fbf07e9e21e1e93',
   );
   static final Uint8List _soDigest = _hex(
-    'ec3f447f41e161b0dec7ce6d5ce9d52428895da54e0d9d036d93913b45c7a3c1',
+    '90e2fb8745b17b42a10182f8d8ac590e3fca5b311e2ce2d5144fa2c18cb3090d',
   );
   static final Uint8List _dexDigest = _hex(
-    'd590910db09464e19553e22c184c135ace8c6cb6d4407920f949d561724fb8fe',
+    '0a6265f6e5d8231b9cba641f8c40475e6f3baeb06ed41b804b9bf7307aa4214e',
   );
 
   static Uint8List compute(int callsSeed, String deviceId) {
@@ -19,8 +19,8 @@ class ChatCacheFingerprint {
     final device = Uint8List.fromList(utf8.encode(deviceId));
     final result = BytesBuilder();
     result.add(_sha256(_signatureDigest, seed, device));
-    result.add(_sha256(_soDigest, seed, device));
     result.add(_sha256(_dexDigest, seed, device));
+    result.add(_sha256(_soDigest, seed, device));
     return result.toBytes();
   }
 
diff --git a/lib/core/storage/spoofing_service.dart b/lib/core/storage/spoofing_service.dart
index f0eee5a..0fb6451 100644
--- a/lib/core/storage/spoofing_service.dart
+++ b/lib/core/storage/spoofing_service.dart
@@ -8,8 +8,8 @@ import '../../models/spoof_profile.dart';
 import 'token_storage.dart';
 
 class SpoofingService {
-  static const String hardcodedAppVersion = '26.19.2';
-  static const int hardcodedBuildNumber = 6732;
+  static const String hardcodedAppVersion = '26.20.2';
+  static const int hardcodedBuildNumber = 6758;
   static const String pendingScope = 'pending';
 
   static const String _legacyEnabledKey = 'spoofing_enabled';