diff --git a/Telegram/SourceFiles/calls/calls_call.cpp b/Telegram/SourceFiles/calls/calls_call.cpp
index 72f621ed0e..b654657c88 100644
--- a/Telegram/SourceFiles/calls/calls_call.cpp
+++ b/Telegram/SourceFiles/calls/calls_call.cpp
@@ -37,6 +37,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 namespace tgcalls {
 class InstanceImpl;
 class InstanceV2Impl;
+class InstanceV2ReferenceImpl;
 class InstanceV2_4_0_0Impl;
 class InstanceImplLegacy;
 void SetLegacyGlobalServerConfig(const std::string &serverConfig);
@@ -53,6 +54,7 @@ const auto kDefaultVersion = "2.4.4"_q;
 
 const auto Register = tgcalls::Register<tgcalls::InstanceImpl>();
 const auto RegisterV2 = tgcalls::Register<tgcalls::InstanceV2Impl>();
+const auto RegV2Ref = tgcalls::Register<tgcalls::InstanceV2ReferenceImpl>();
 const auto RegisterV240 = tgcalls::Register<tgcalls::InstanceV2_4_0_0Impl>();
 const auto RegisterLegacy = tgcalls::Register<tgcalls::InstanceImplLegacy>();
 
diff --git a/Telegram/ThirdParty/libtgvoip b/Telegram/ThirdParty/libtgvoip
index a090c6a8f7..78a8e22bed 160000
--- a/Telegram/ThirdParty/libtgvoip
+++ b/Telegram/ThirdParty/libtgvoip
@@ -1 +1 @@
-Subproject commit a090c6a8f7bfb365b301d85bb8c9664d71321c5c
+Subproject commit 78a8e22bedb0d06004da8bafeba88b7474cb89a4
diff --git a/Telegram/ThirdParty/tgcalls b/Telegram/ThirdParty/tgcalls
index 9a6e515fbb..26253546aa 160000
--- a/Telegram/ThirdParty/tgcalls
+++ b/Telegram/ThirdParty/tgcalls
@@ -1 +1 @@
-Subproject commit 9a6e515fbb1e9c53266456447b8f301fe200ad44
+Subproject commit 26253546aa108eca268d2acd1598ad7cf1ccdb6d
diff --git a/Telegram/build/prepare/prepare.py b/Telegram/build/prepare/prepare.py
index eadc938698..5461449609 100644
--- a/Telegram/build/prepare/prepare.py
+++ b/Telegram/build/prepare/prepare.py
@@ -1243,9 +1243,9 @@ mac:
 stage('tg_owt', """
     git clone https://github.com/desktop-app/tg_owt.git
     cd tg_owt
-    git checkout 1fe5e68d99
+    git checkout bab760d7bd
     git submodule init
-    git submodule update src/third_party/libyuv
+    git submodule update src/third_party/libyuv src/third_party/crc32c/src
 win:
     SET MOZJPEG_PATH=$LIBS_DIR/mozjpeg
     SET OPUS_PATH=$USED_PREFIX/include/opus
diff --git a/Telegram/cmake/lib_tgcalls.cmake b/Telegram/cmake/lib_tgcalls.cmake
index 256a6280f5..34a5ba418b 100644
--- a/Telegram/cmake/lib_tgcalls.cmake
+++ b/Telegram/cmake/lib_tgcalls.cmake
@@ -30,6 +30,8 @@ PRIVATE
     EncryptedConnection.h
     FakeAudioDeviceModule.cpp
     FakeAudioDeviceModule.h
+    FieldTrialsConfig.cpp
+    FieldTrialsConfig.h
     InstanceImpl.cpp
     InstanceImpl.h
     LogSinkImpl.cpp
@@ -55,18 +57,31 @@ PRIVATE
     VideoCaptureInterfaceImpl.h
     VideoCapturerInterface.h
 
+    utils/gzip.cpp
+    utils/gzip.h
+
     v2/ContentNegotiation.cpp
     v2/ContentNegotiation.h
-    # v2/InstanceV2ReferenceImpl.cpp
-    # v2/InstanceV2ReferenceImpl.h
+    v2/ExternalSignalingConnection.cpp
+    v2/ExternalSignalingConnection.h
+    v2/InstanceV2ReferenceImpl.cpp
+    v2/InstanceV2ReferenceImpl.h
     v2/InstanceV2Impl.cpp
     v2/InstanceV2Impl.h
     v2/NativeNetworkingImpl.cpp
     v2/NativeNetworkingImpl.h
+    v2/ReflectorPort.cpp
+    v2/ReflectorPort.h
+    v2/ReflectorRelayPortFactory.cpp
+    v2/ReflectorRelayPortFactory.h
     v2/Signaling.cpp
     v2/Signaling.h
+    v2/SignalingConnection.cpp
+    v2/SignalingConnection.h
     v2/SignalingEncryption.cpp
     v2/SignalingEncryption.h
+    v2/SignalingSctpConnection.cpp
+    v2/SignalingSctpConnection.h
     v2_4_0_0/InstanceV2_4_0_0Impl.cpp
     v2_4_0_0/InstanceV2_4_0_0Impl.h
     v2_4_0_0/Signaling_4_0_0.cpp
@@ -185,6 +200,7 @@ PRIVATE
     desktop-app::external_ffmpeg
     desktop-app::external_openssl
     desktop-app::external_rnnoise
+    desktop-app::external_zlib
 )
 
 target_compile_definitions(lib_tgcalls
diff --git a/Telegram/lib_webrtc b/Telegram/lib_webrtc
index b2e6841058..836fdb0506 160000
--- a/Telegram/lib_webrtc
+++ b/Telegram/lib_webrtc
@@ -1 +1 @@
-Subproject commit b2e684105884f781c2de6e77bf47a10919406325
+Subproject commit 836fdb0506ca362f08ccacc1501aa84fe68333ae
diff --git a/cmake b/cmake
index 26d31dbdef..b4fff01757 160000
--- a/cmake
+++ b/cmake
@@ -1 +1 @@
-Subproject commit 26d31dbdef488f9a29b58a8823de3b457829cba2
+Subproject commit b4fff0175709d20041ddf60db4bf57335bc99af1