diff --git a/Telegram/SourceFiles/calls/calls_call.cpp b/Telegram/SourceFiles/calls/calls_call.cpp
index 7a55991dbd..3a34f07836 100644
--- a/Telegram/SourceFiles/calls/calls_call.cpp
+++ b/Telegram/SourceFiles/calls/calls_call.cpp
@@ -303,7 +303,6 @@ void Call::startOutgoing() {
 	_api.request(MTPphone_RequestCall(
 		MTP_flags(flags),
 		_user->inputUser,
-		MTPInputGroupCall(),
 		MTP_int(base::RandomValue<int32>()),
 		MTP_bytes(_gaHash),
 		MTP_phoneCallProtocol(
diff --git a/Telegram/SourceFiles/calls/group/calls_group_call.cpp b/Telegram/SourceFiles/calls/group/calls_group_call.cpp
index ce0fddd314..3ab9bfb314 100644
--- a/Telegram/SourceFiles/calls/group/calls_group_call.cpp
+++ b/Telegram/SourceFiles/calls/group/calls_group_call.cpp
@@ -1428,7 +1428,7 @@ void GroupCall::rejoin(not_null<PeerData*> as) {
 					? Flag::f_video_stopped
 					: Flag(0))
 				| (_conferenceJoinMessageId ? Flag::f_invite_msg_id : Flag())
-				| (_e2e ? Flag::f_public_key : Flag());
+				| (_e2e ? (Flag::f_public_key | Flag::f_block) : Flag());
 			_api.request(MTPphone_JoinGroupCall(
 				MTP_flags(flags),
 				(_conferenceLinkSlug.isEmpty()
@@ -1438,6 +1438,10 @@ void GroupCall::rejoin(not_null<PeerData*> as) {
 				joinAs()->input,
 				MTP_string(_joinHash),
 				(_e2e ? TdE2E::PublicKeyToMTP(_e2e->myKey()) : MTPint256()),
+				(_e2e
+					? MTP_bytes(
+						_e2e->lastBlock0().value_or(TdE2E::Block()).data)
+					: MTPbytes()),
 				MTP_int(_conferenceJoinMessageId.bare),
 				MTP_dataJSON(MTP_bytes(json))
 			)).done([=](
diff --git a/Telegram/SourceFiles/calls/group/calls_group_menu.cpp b/Telegram/SourceFiles/calls/group/calls_group_menu.cpp
index 51a9068a73..277c64356e 100644
--- a/Telegram/SourceFiles/calls/group/calls_group_menu.cpp
+++ b/Telegram/SourceFiles/calls/group/calls_group_menu.cpp
@@ -490,11 +490,12 @@ void FillMenu(
 		Fn<void(object_ptr<Ui::BoxContent>)> showBox) {
 	const auto weak = base::make_weak(call);
 	const auto resolveReal = [=] {
-		const auto real = peer->groupCall();
-		const auto strong = weak.get();
-		return (real && strong && (real->id() == strong->id()))
-			? real
-			: nullptr;
+		if (const auto strong = weak.get()) {
+			if (const auto real = strong->lookupReal()) {
+				return real;
+			}
+		}
+		return (Data::GroupCall*)nullptr;
 	};
 	const auto real = resolveReal();
 	if (!real) {
diff --git a/Telegram/SourceFiles/data/data_media_types.cpp b/Telegram/SourceFiles/data/data_media_types.cpp
index 2be78e44fc..067e8af492 100644
--- a/Telegram/SourceFiles/data/data_media_types.cpp
+++ b/Telegram/SourceFiles/data/data_media_types.cpp
@@ -467,8 +467,8 @@ Call ComputeCallData(const MTPDmessageActionPhoneCall &call) {
 				return CallFinishReason::Hangup;
 			}, [](const MTPDphoneCallDiscardReasonMissed &) {
 				return CallFinishReason::Missed;
-			}, [](const MTPDphoneCallDiscardReasonAllowGroupCall &) {
-				return CallFinishReason::AllowGroupCall;
+			}, [](const MTPDphoneCallDiscardReasonMigrateConferenceCall &) {
+				return CallFinishReason::MigrateConferenceCall;
 			});
 			Unexpected("Call reason type.");
 		}
diff --git a/Telegram/SourceFiles/data/data_media_types.h b/Telegram/SourceFiles/data/data_media_types.h
index b6e2a32bbd..14452c7972 100644
--- a/Telegram/SourceFiles/data/data_media_types.h
+++ b/Telegram/SourceFiles/data/data_media_types.h
@@ -46,7 +46,7 @@ enum class CallFinishReason : char {
 	Busy,
 	Disconnected,
 	Hangup,
-	AllowGroupCall,
+	MigrateConferenceCall,
 };
 
 struct SharedContact final {
diff --git a/Telegram/SourceFiles/export/data/export_data_types.cpp b/Telegram/SourceFiles/export/data/export_data_types.cpp
index e9a91b434f..919b35f8ef 100644
--- a/Telegram/SourceFiles/export/data/export_data_types.cpp
+++ b/Telegram/SourceFiles/export/data/export_data_types.cpp
@@ -1471,8 +1471,8 @@ ServiceAction ParseServiceAction(
 				return Reason::Hangup;
 			}, [](const MTPDphoneCallDiscardReasonBusy &data) {
 				return Reason::Busy;
-			}, [](const MTPDphoneCallDiscardReasonAllowGroupCall &) {
-				return Reason::AllowGroupCall;
+			}, [](const MTPDphoneCallDiscardReasonMigrateConferenceCall &) {
+				return Reason::MigrateConferenceCall;
 			});
 		}
 		result.content = content;
diff --git a/Telegram/SourceFiles/export/data/export_data_types.h b/Telegram/SourceFiles/export/data/export_data_types.h
index afdf7251bf..3b37de23d9 100644
--- a/Telegram/SourceFiles/export/data/export_data_types.h
+++ b/Telegram/SourceFiles/export/data/export_data_types.h
@@ -503,7 +503,7 @@ struct ActionPhoneCall {
 		Disconnect,
 		Hangup,
 		Busy,
-		AllowGroupCall,
+		MigrateConferenceCall,
 	};
 	DiscardReason discardReason = DiscardReason::Unknown;
 	int duration = 0;
diff --git a/Telegram/SourceFiles/export/output/export_output_json.cpp b/Telegram/SourceFiles/export/output/export_output_json.cpp
index e8d083dfb7..5e263e60d3 100644
--- a/Telegram/SourceFiles/export/output/export_output_json.cpp
+++ b/Telegram/SourceFiles/export/output/export_output_json.cpp
@@ -472,6 +472,8 @@ QByteArray SerializeMessage(
 			case Reason::Disconnect: return "disconnect";
 			case Reason::Hangup: return "hangup";
 			case Reason::Missed: return "missed";
+			case Reason::MigrateConferenceCall:
+				return "migrate_conference_all";
 			}
 			return "";
 		}());
diff --git a/Telegram/SourceFiles/mtproto/scheme/api.tl b/Telegram/SourceFiles/mtproto/scheme/api.tl
index ec6d3baef5..71bf5182ad 100644
--- a/Telegram/SourceFiles/mtproto/scheme/api.tl
+++ b/Telegram/SourceFiles/mtproto/scheme/api.tl
@@ -903,7 +903,7 @@ phoneCallDiscardReasonMissed#85e42301 = PhoneCallDiscardReason;
 phoneCallDiscardReasonDisconnect#e095c1a0 = PhoneCallDiscardReason;
 phoneCallDiscardReasonHangup#57adc690 = PhoneCallDiscardReason;
 phoneCallDiscardReasonBusy#faf7e8c9 = PhoneCallDiscardReason;
-phoneCallDiscardReasonAllowGroupCall#afe2b839 encrypted_key:bytes = PhoneCallDiscardReason;
+phoneCallDiscardReasonMigrateConferenceCall#9fbbf1f7 slug:string = PhoneCallDiscardReason;
 
 dataJSON#7d748d04 data:string = DataJSON;
 
@@ -958,11 +958,11 @@ inputStickerSetItem#32da9e9c flags:# document:InputDocument emoji:string mask_co
 inputPhoneCall#1e36fded id:long access_hash:long = InputPhoneCall;
 
 phoneCallEmpty#5366c915 id:long = PhoneCall;
-phoneCallWaiting#eed42858 flags:# video:flags.6?true id:long access_hash:long date:int admin_id:long participant_id:long protocol:PhoneCallProtocol receive_date:flags.0?int conference_call:flags.8?InputGroupCall = PhoneCall;
-phoneCallRequested#45361c63 flags:# video:flags.6?true id:long access_hash:long date:int admin_id:long participant_id:long g_a_hash:bytes protocol:PhoneCallProtocol conference_call:flags.8?InputGroupCall = PhoneCall;
-phoneCallAccepted#22fd7181 flags:# video:flags.6?true id:long access_hash:long date:int admin_id:long participant_id:long g_b:bytes protocol:PhoneCallProtocol conference_call:flags.8?InputGroupCall = PhoneCall;
-phoneCall#3ba5940c flags:# p2p_allowed:flags.5?true video:flags.6?true id:long access_hash:long date:int admin_id:long participant_id:long g_a_or_b:bytes key_fingerprint:long protocol:PhoneCallProtocol connections:Vector<PhoneConnection> start_date:int custom_parameters:flags.7?DataJSON conference_call:flags.8?InputGroupCall = PhoneCall;
-phoneCallDiscarded#f9d25503 flags:# need_rating:flags.2?true need_debug:flags.3?true video:flags.6?true id:long reason:flags.0?PhoneCallDiscardReason duration:flags.1?int conference_call:flags.8?InputGroupCall = PhoneCall;
+phoneCallWaiting#c5226f17 flags:# video:flags.6?true id:long access_hash:long date:int admin_id:long participant_id:long protocol:PhoneCallProtocol receive_date:flags.0?int = PhoneCall;
+phoneCallRequested#14b0ed0c flags:# video:flags.6?true id:long access_hash:long date:int admin_id:long participant_id:long g_a_hash:bytes protocol:PhoneCallProtocol = PhoneCall;
+phoneCallAccepted#3660c311 flags:# video:flags.6?true id:long access_hash:long date:int admin_id:long participant_id:long g_b:bytes protocol:PhoneCallProtocol = PhoneCall;
+phoneCall#30535af5 flags:# p2p_allowed:flags.5?true video:flags.6?true id:long access_hash:long date:int admin_id:long participant_id:long g_a_or_b:bytes key_fingerprint:long protocol:PhoneCallProtocol connections:Vector<PhoneConnection> start_date:int custom_parameters:flags.7?DataJSON = PhoneCall;
+phoneCallDiscarded#50ca4de1 flags:# need_rating:flags.2?true need_debug:flags.3?true video:flags.6?true id:long reason:flags.0?PhoneCallDiscardReason duration:flags.1?int = PhoneCall;
 
 phoneConnection#9cc123c7 flags:# tcp:flags.0?true id:long ip:string ipv6:string port:int peer_tag:bytes = PhoneConnection;
 phoneConnectionWebrtc#635fe375 flags:# turn:flags.0?true stun:flags.1?true id:long ip:string ipv6:string port:int username:string password:string = PhoneConnection;
@@ -2576,7 +2576,7 @@ stickers.deleteStickerSet#87704394 stickerset:InputStickerSet = Bool;
 stickers.replaceSticker#4696459a sticker:InputDocument new_sticker:InputStickerSetItem = messages.StickerSet;
 
 phone.getCallConfig#55451fa9 = DataJSON;
-phone.requestCall#a6c4600c flags:# video:flags.0?true user_id:InputUser conference_call:flags.1?InputGroupCall random_id:int g_a_hash:bytes protocol:PhoneCallProtocol = phone.PhoneCall;
+phone.requestCall#42ff96ed flags:# video:flags.0?true user_id:InputUser random_id:int g_a_hash:bytes protocol:PhoneCallProtocol = phone.PhoneCall;
 phone.acceptCall#3bd2b4a0 peer:InputPhoneCall g_b:bytes protocol:PhoneCallProtocol = phone.PhoneCall;
 phone.confirmCall#2efe1722 peer:InputPhoneCall g_a:bytes key_fingerprint:long protocol:PhoneCallProtocol = phone.PhoneCall;
 phone.receivedCall#17d54f61 peer:InputPhoneCall = Bool;
@@ -2585,7 +2585,7 @@ phone.setCallRating#59ead627 flags:# user_initiative:flags.0?true peer:InputPhon
 phone.saveCallDebug#277add7e peer:InputPhoneCall debug:DataJSON = Bool;
 phone.sendSignalingData#ff7a9383 peer:InputPhoneCall data:bytes = Bool;
 phone.createGroupCall#48cdc6d8 flags:# rtmp_stream:flags.2?true peer:InputPeer random_id:int title:flags.0?string schedule_date:flags.1?int = Updates;
-phone.joinGroupCall#ffae43f4 flags:# muted:flags.0?true video_stopped:flags.2?true call:InputGroupCall join_as:InputPeer invite_hash:flags.1?string public_key:flags.3?int256 invite_msg_id:flags.4?int params:DataJSON = Updates;
+phone.joinGroupCall#dac17b9e flags:# muted:flags.0?true video_stopped:flags.2?true call:InputGroupCall join_as:InputPeer invite_hash:flags.1?string public_key:flags.3?int256 block:flags.3?bytes invite_msg_id:flags.4?int params:DataJSON = Updates;
 phone.leaveGroupCall#500377f9 call:InputGroupCall source:int = Updates;
 phone.inviteToGroupCall#7b393160 call:InputGroupCall users:Vector<InputUser> = Updates;
 phone.discardGroupCall#7a777135 call:InputGroupCall = Updates;
@@ -2607,7 +2607,6 @@ phone.getGroupCallStreamChannels#1ab21940 call:InputGroupCall = phone.GroupCallS
 phone.getGroupCallStreamRtmpUrl#deb3abbf peer:InputPeer revoke:Bool = phone.GroupCallStreamRtmpUrl;
 phone.saveCallLog#41248786 peer:InputPhoneCall file:InputFile = Bool;
 phone.createConferenceCall#dae2632f public_key:int256 zero_block:bytes = phone.GroupCall;
-phone.addConferenceCallParticipant#3cb2a504 call:InputGroupCall peer:InputPeer block:bytes = Updates;
 phone.deleteConferenceCallParticipant#7b8cc2a3 call:InputGroupCall peer:InputPeer block:bytes = Updates;
 phone.sendConferenceCallBroadcast#c6701900 call:InputGroupCall block:bytes = Updates;
 phone.inviteConferenceCallParticipant#3e9cf7ee call:InputGroupCall user_id:InputUser = Updates;
diff --git a/Telegram/SourceFiles/tde2e/tde2e_api.cpp b/Telegram/SourceFiles/tde2e/tde2e_api.cpp
index 23bdc6bc08..190247a8bc 100644
--- a/Telegram/SourceFiles/tde2e/tde2e_api.cpp
+++ b/Telegram/SourceFiles/tde2e/tde2e_api.cpp
@@ -109,6 +109,10 @@ void Call::apply(
 		bool fromShortPoll) {
 	Expects(subchain >= 0 && subchain < kSubChainsCount);
 
+	if (!subchain && index >= _lastBlock0Height) {
+		_lastBlock0 = block;
+		_lastBlock0Height = index;
+	}
 	if (!subchain && !_id.v) {
 		create(block);
 	}
@@ -213,6 +217,10 @@ rpl::producer<CallFailure> Call::failures() const {
 	return _failures.events();
 }
 
+const std::optional<Block> &Call::lastBlock0() const {
+	return _lastBlock0;
+}
+
 std::vector<uint8_t> Call::encrypt(const std::vector<uint8_t> &data) const {
 	const auto result = tde2e_api::call_encrypt(
 		std::int64_t(_id.v),
diff --git a/Telegram/SourceFiles/tde2e/tde2e_api.h b/Telegram/SourceFiles/tde2e/tde2e_api.h
index 17634d9835..5385a8681c 100644
--- a/Telegram/SourceFiles/tde2e/tde2e_api.h
+++ b/Telegram/SourceFiles/tde2e/tde2e_api.h
@@ -75,6 +75,8 @@ public:
 	[[nodiscard]] std::optional<CallFailure> failed() const;
 	[[nodiscard]] rpl::producer<CallFailure> failures() const;
 
+	[[nodiscard]] const std::optional<Block> &lastBlock0() const;
+
 	[[nodiscard]] std::vector<uint8_t> encrypt(
 		const std::vector<uint8_t> &data) const;
 	[[nodiscard]] std::vector<uint8_t> decrypt(
@@ -107,6 +109,9 @@ private:
 	SubChainState _subchains[kSubChainsCount];
 	rpl::event_stream<SubchainRequest> _subchainRequests;
 
+	std::optional<Block> _lastBlock0;
+	int _lastBlock0Height = 0;
+
 };
 
 } // namespace TdE2E