diff --git a/CMakeLists.txt b/CMakeLists.txt
index 96d1f8ae..757d4338 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.0.2 FATAL_ERROR)
 
-project(TDLib VERSION 1.0.0 LANGUAGES CXX C)
+project(TDLib VERSION 1.0.1 LANGUAGES CXX C)
 
 if (NOT DEFINED CMAKE_MODULE_PATH)
   set(CMAKE_MODULE_PATH "")
diff --git a/example/cpp/CMakeLists.txt b/example/cpp/CMakeLists.txt
index a4968802..5f161dde 100644
--- a/example/cpp/CMakeLists.txt
+++ b/example/cpp/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.1 FATAL_ERROR)
 
 project(TdExample VERSION 1.0 LANGUAGES CXX)
 
-find_package(Td 1.0.0)
+find_package(Td 1.0.1)
 
 add_executable(tdjson_example tdjson_example.cpp)
 target_link_libraries(tdjson_example PRIVATE Td::TdJson)
diff --git a/td/generate/scheme/td_api.tl b/td/generate/scheme/td_api.tl
index b060ad0f..91b70569 100644
--- a/td/generate/scheme/td_api.tl
+++ b/td/generate/scheme/td_api.tl
@@ -2613,8 +2613,8 @@ getSupportUser = User;
 getWallpapers = Wallpapers;
 
 
-//@description Registers the currently used device for receiving push notifications @device_token Device token
-registerDevice device_token:DeviceToken = Ok;
+//@description Registers the currently used device for receiving push notifications @device_token Device token @other_user_ids List of at most 100 user identifiers of other users currently using the client
+registerDevice device_token:DeviceToken other_user_ids:vector<int32> = Ok;
 
 
 //@description Returns t.me URLs recently visited by a newly registered user @referrer Google Play referrer to identify the user
diff --git a/td/generate/scheme/td_api.tlo b/td/generate/scheme/td_api.tlo
index 095fabb2..a88e64f2 100644
Binary files a/td/generate/scheme/td_api.tlo and b/td/generate/scheme/td_api.tlo differ
diff --git a/td/telegram/DeviceTokenManager.cpp b/td/telegram/DeviceTokenManager.cpp
index 42ab85e7..98f7c91e 100644
--- a/td/telegram/DeviceTokenManager.cpp
+++ b/td/telegram/DeviceTokenManager.cpp
@@ -9,6 +9,7 @@
 #include "td/telegram/Global.h"
 #include "td/telegram/misc.h"
 #include "td/telegram/net/NetQueryDispatcher.h"
+#include "td/telegram/UserId.h"
 
 #include "td/telegram/td_api.hpp"
 #include "td/telegram/telegram_api.h"
@@ -16,120 +17,197 @@
 #include "td/utils/format.h"
 #include "td/utils/logging.h"
 #include "td/utils/Status.h"
+#include "td/utils/tl_helpers.h"
 
 #include <type_traits>
 
 namespace td {
-void DeviceTokenManager::register_device(tl_object_ptr<td_api::DeviceToken> device_token,
-                                         Promise<tl_object_ptr<td_api::ok>> promise) {
-  Token token(*device_token);
-  if (!clean_input_string(token.token)) {
-    return promise.set_error(Status::Error(400, "Device token must be encoded in UTF-8"));
-  }
 
-  auto &info = tokens_[token.type];
-  info.net_query_id = 0;
-  if (token.token.empty()) {
-    info.state = TokenInfo::State::Unregister;
-    if (info.token.empty()) {
-      info.state = TokenInfo::State::Sync;
-    }
+template <class StorerT>
+void DeviceTokenManager::TokenInfo::store(StorerT &storer) const {
+  using td::store;
+  bool has_other_user_ids = !other_user_ids.empty();
+  bool is_sync = state == State::Sync;
+  bool is_unregister = state == State::Unregister;
+  bool is_register = state == State::Register;
+  BEGIN_STORE_FLAGS();
+  STORE_FLAG(has_other_user_ids);
+  STORE_FLAG(is_sync);
+  STORE_FLAG(is_unregister);
+  STORE_FLAG(is_register);
+  END_STORE_FLAGS();
+  store(token, storer);
+  if (has_other_user_ids) {
+    store(other_user_ids, storer);
+  }
+}
+
+template <class ParserT>
+void DeviceTokenManager::TokenInfo::parse(ParserT &parser) {
+  using td::parse;
+  bool has_other_user_ids;
+  bool is_sync;
+  bool is_unregister;
+  bool is_register;
+  BEGIN_PARSE_FLAGS();
+  PARSE_FLAG(has_other_user_ids);
+  PARSE_FLAG(is_sync);
+  PARSE_FLAG(is_unregister);
+  PARSE_FLAG(is_register);
+  END_PARSE_FLAGS();
+  CHECK(is_sync + is_unregister + is_register == 1);
+  if (is_sync) {
+    state = State::Sync;
+  } else if (is_unregister) {
+    state = State::Unregister;
   } else {
-    info.token = token.token;
-    info.state = TokenInfo::State::Register;
+    state = State::Register;
   }
-  if (info.promise) {
-    info.promise.set_error(Status::Error(5, "Cancelled due to new registerDevice request"));
+  parse(token, parser);
+  if (has_other_user_ids) {
+    parse(other_user_ids, parser);
   }
-  info.promise = std::move(promise);
-  save_info(token.type);
-  loop();
 }
 
-DeviceTokenManager::Token::Token(td_api::DeviceToken &device_token) {
-  bool ok = downcast_call(device_token, [&](auto &obj) { token = obj.token_; });
-  CHECK(ok);
-  type = [&] {
-    switch (device_token.get_id()) {
-      case td_api::deviceTokenApplePush::ID:
-        return TokenType::APNS;
-      case td_api::deviceTokenGoogleCloudMessaging::ID:
-        return TokenType::GCM;
-      case td_api::deviceTokenMicrosoftPush::ID:
-        return TokenType::MPNS;
-      case td_api::deviceTokenUbuntuPush::ID:
-        return TokenType::UbuntuPhone;
-      case td_api::deviceTokenBlackberryPush::ID:
-        return TokenType::Blackberry;
-      default:
-        UNREACHABLE();
-    }
-  }();
-}
-tl_object_ptr<td_api::DeviceToken> DeviceTokenManager::Token::as_td_api() {
-  switch (type) {
-    case TokenType::APNS:
-      return make_tl_object<td_api::deviceTokenApplePush>(token);
-    case TokenType::GCM:
-      return make_tl_object<td_api::deviceTokenGoogleCloudMessaging>(token);
-    case TokenType::MPNS:
-      return make_tl_object<td_api::deviceTokenMicrosoftPush>(token);
-    case TokenType::SimplePush:
-      return make_tl_object<td_api::deviceTokenSimplePush>(token);
-    case TokenType::UbuntuPhone:
-      return make_tl_object<td_api::deviceTokenUbuntuPush>(token);
-    case TokenType::Blackberry:
-      return make_tl_object<td_api::deviceTokenBlackberryPush>(token);
+StringBuilder &operator<<(StringBuilder &string_builder, const DeviceTokenManager::TokenInfo &token_info) {
+  switch (token_info.state) {
+    case DeviceTokenManager::TokenInfo::State::Sync:
+      string_builder << "Synchronized";
+      break;
+    case DeviceTokenManager::TokenInfo::State::Unregister:
+      string_builder << "Unregister";
+      break;
+    case DeviceTokenManager::TokenInfo::State::Register:
+      string_builder << "Register";
+      break;
     default:
       UNREACHABLE();
   }
-}
-DeviceTokenManager::TokenInfo::TokenInfo(string from) {
-  if (from.empty()) {
-    return;
+  string_builder << " token \"" << format::escaped(token_info.token) << "\"";
+  if (!token_info.other_user_ids.empty()) {
+    string_builder << ", with other users " << token_info.other_user_ids;
   }
-  char c = from[0];
-  if (c == '+') {
-    state = State::Register;
-  } else if (c == '-') {
-    state = State::Unregister;
-  } else if (c == '=') {
-    state = State::Sync;
-  } else {
-    LOG(ERROR) << "Invalid serialized TokenInfo: " << tag("token_info", from);
-    return;
-  }
-  token = from.substr(1);
+  return string_builder;
 }
 
-string DeviceTokenManager::TokenInfo::serialize() {
-  char c = [&] {
-    switch (state) {
-      case State::Sync:
-        return '=';
-      case State::Unregister:
-        return '-';
-      case State::Register:
-        return '+';
-      default:
-        UNREACHABLE();
+void DeviceTokenManager::register_device(tl_object_ptr<td_api::DeviceToken> device_token_ptr,
+                                         vector<int32> other_user_ids, Promise<tl_object_ptr<td_api::ok>> promise) {
+  CHECK(device_token_ptr != nullptr);
+  TokenType token_type;
+  string token;
+  switch (device_token_ptr->get_id()) {
+    case td_api::deviceTokenApplePush::ID: {
+      auto device_token = static_cast<td_api::deviceTokenApplePush *>(device_token_ptr.get());
+      token = std::move(device_token->token_);
+      token_type = TokenType::APNS;
+      break;
     }
-  }();
-  return c + token;
+    case td_api::deviceTokenGoogleCloudMessaging::ID: {
+      auto device_token = static_cast<td_api::deviceTokenGoogleCloudMessaging *>(device_token_ptr.get());
+      token = std::move(device_token->token_);
+      token_type = TokenType::GCM;
+      break;
+    }
+    case td_api::deviceTokenMicrosoftPush::ID: {
+      auto device_token = static_cast<td_api::deviceTokenMicrosoftPush *>(device_token_ptr.get());
+      token = std::move(device_token->token_);
+      token_type = TokenType::MPNS;
+      break;
+    }
+    case td_api::deviceTokenSimplePush::ID: {
+      auto device_token = static_cast<td_api::deviceTokenSimplePush *>(device_token_ptr.get());
+      token = std::move(device_token->token_);
+      token_type = TokenType::SimplePush;
+      break;
+    }
+    case td_api::deviceTokenUbuntuPush::ID: {
+      auto device_token = static_cast<td_api::deviceTokenUbuntuPush *>(device_token_ptr.get());
+      token = std::move(device_token->token_);
+      token_type = TokenType::UbuntuPhone;
+      break;
+    }
+    case td_api::deviceTokenBlackberryPush::ID: {
+      auto device_token = static_cast<td_api::deviceTokenBlackberryPush *>(device_token_ptr.get());
+      token = std::move(device_token->token_);
+      token_type = TokenType::Blackberry;
+      break;
+    }
+    default:
+      UNREACHABLE();
+  }
+  if (!clean_input_string(token)) {
+    return promise.set_error(Status::Error(400, "Device token must be encoded in UTF-8"));
+  }
+  for (auto &other_user_id : other_user_ids) {
+    UserId user_id(other_user_id);
+    if (!user_id.is_valid()) {
+      return promise.set_error(Status::Error(400, "Invalid user_id among other user_ids"));
+    }
+  }
+  if (other_user_ids.size() > MAX_OTHER_USER_IDS) {
+    return promise.set_error(Status::Error(400, "Too much other user_ids"));
+  }
+
+  auto &info = tokens_[token_type];
+  info.net_query_id = 0;
+  if (token.empty()) {
+    if (info.token.empty()) {
+      // already unregistered
+      return promise.set_value(make_tl_object<td_api::ok>());
+    }
+
+    info.state = TokenInfo::State::Unregister;
+  } else {
+    info.state = TokenInfo::State::Register;
+    info.token = std::move(token);
+  }
+  info.other_user_ids = std::move(other_user_ids);
+  info.promise.set_value(make_tl_object<td_api::ok>());
+  info.promise = std::move(promise);
+  save_info(token_type);
+}
+
+string DeviceTokenManager::get_database_key(int32 token_type) {
+  return PSTRING() << "device_token" << token_type;
 }
 
 void DeviceTokenManager::start_up() {
   for (int32 token_type = 1; token_type < TokenType::Size; token_type++) {
-    tokens_[token_type] = TokenInfo(G()->td_db()->get_binlog_pmc()->get(PSTRING() << "device_token" << token_type));
-    LOG(INFO) << token_type << "--->" << tokens_[token_type].serialize();
+    auto serialized = G()->td_db()->get_binlog_pmc()->get(get_database_key(token_type));
+    if (serialized.empty()) {
+      continue;
+    }
+
+    auto &token = tokens_[token_type];
+    char c = serialized[0];
+    if (c == '*') {
+      unserialize(token, serialized.substr(1)).ensure();
+    } else {
+      // legacy
+      if (c == '+') {
+        token.state = TokenInfo::State::Register;
+      } else if (c == '-') {
+        token.state = TokenInfo::State::Unregister;
+      } else if (c == '=') {
+        token.state = TokenInfo::State::Sync;
+      } else {
+        LOG(ERROR) << "Invalid serialized TokenInfo: " << format::escaped(serialized);
+        continue;
+      }
+      token.token = serialized.substr(1);
+    }
+    LOG(INFO) << "GET device token " << token_type << "--->" << tokens_[token_type];
   }
   loop();
 }
+
 void DeviceTokenManager::save_info(int32 token_type) {
-  auto key = PSTRING() << "device_token" << token_type;
-  string value = tokens_[token_type].serialize();
-  LOG(INFO) << "SET " << key << "--->" << value;
-  G()->td_db()->get_binlog_pmc()->set(key, value);
+  LOG(INFO) << "SET device token " << token_type << "--->" << tokens_[token_type];
+  if (tokens_[token_type].token.empty()) {
+    G()->td_db()->get_binlog_pmc()->erase(get_database_key(token_type));
+  } else {
+    G()->td_db()->get_binlog_pmc()->set(get_database_key(token_type), "*" + serialize(tokens_[token_type]));
+  }
   sync_cnt_++;
   G()->td_db()->get_binlog_pmc()->force_sync(
       PromiseCreator::event(self_closure(this, &DeviceTokenManager::dec_sync_cnt)));
@@ -154,12 +232,13 @@ void DeviceTokenManager::loop() {
     }
     // have to send query
     NetQueryPtr net_query;
+    auto other_user_ids = info.other_user_ids;
     if (info.state == TokenInfo::State::Unregister) {
       net_query = G()->net_query_creator().create(
-          create_storer(telegram_api::account_unregisterDevice(token_type, info.token, {})));
+          create_storer(telegram_api::account_unregisterDevice(token_type, info.token, std::move(other_user_ids))));
     } else {
-      net_query = G()->net_query_creator().create(
-          create_storer(telegram_api::account_registerDevice(token_type, info.token, false, {})));
+      net_query = G()->net_query_creator().create(create_storer(
+          telegram_api::account_registerDevice(token_type, info.token, false, std::move(other_user_ids))));
     }
     info.net_query_id = net_query->id();
     G()->net_query_dispatcher().dispatch_with_callback(std::move(net_query), actor_shared(this, token_type));
@@ -209,6 +288,5 @@ void DeviceTokenManager::on_result(NetQueryPtr net_query) {
       LOG(ERROR) << r_flag.error();
     }
   }
-  loop();
 }
 }  // namespace td
diff --git a/td/telegram/DeviceTokenManager.h b/td/telegram/DeviceTokenManager.h
index 3e63c543..2cfbb357 100644
--- a/td/telegram/DeviceTokenManager.h
+++ b/td/telegram/DeviceTokenManager.h
@@ -18,44 +18,48 @@
 #include <array>
 
 namespace td {
+
 class DeviceTokenManager : public NetQueryCallback {
  public:
   explicit DeviceTokenManager(ActorShared<> parent) : parent_(std::move(parent)) {
   }
-  void register_device(tl_object_ptr<td_api::DeviceToken> device_token, Promise<tl_object_ptr<td_api::ok>> promise);
+  void register_device(tl_object_ptr<td_api::DeviceToken> device_token_ptr, vector<int32> other_user_ids,
+                       Promise<tl_object_ptr<td_api::ok>> promise);
 
  private:
+  static constexpr size_t MAX_OTHER_USER_IDS = 100;
+
   ActorShared<> parent_;
   enum TokenType : int32 { APNS = 1, GCM = 2, MPNS = 3, SimplePush = 4, UbuntuPhone = 5, Blackberry = 6, Size };
-  struct Token {
-    TokenType type;
-    string token;
-    Token(TokenType type, string token) : type(type), token(std::move(token)) {
-    }
-    explicit Token(td_api::DeviceToken &device_token);
-    tl_object_ptr<td_api::DeviceToken> as_td_api();
-  };
   struct TokenInfo {
     enum class State { Sync, Unregister, Register };
     State state = State::Sync;
     string token;
     uint64 net_query_id = 0;
+    vector<int32> other_user_ids;
     Promise<tl_object_ptr<td_api::ok>> promise;
 
-    TokenInfo() = default;
-    explicit TokenInfo(string from);
+    template <class StorerT>
+    void store(StorerT &storer) const;
 
-    string serialize();
+    template <class ParserT>
+    void parse(ParserT &parser);
   };
 
+  friend StringBuilder &operator<<(StringBuilder &string_builder, const TokenInfo &token_info);
+
   std::array<TokenInfo, TokenType::Size> tokens_;
   int32 sync_cnt_{0};
 
   void start_up() override;
+
+  static string get_database_key(int32 token_type);
   void save_info(int32 token_type);
+
   void dec_sync_cnt();
 
   void loop() override;
   void on_result(NetQueryPtr net_query) override;
 };
+
 }  // namespace td
diff --git a/td/telegram/Td.cpp b/td/telegram/Td.cpp
index 3f5c35c7..b929a7b8 100644
--- a/td/telegram/Td.cpp
+++ b/td/telegram/Td.cpp
@@ -4598,7 +4598,7 @@ void Td::on_request(uint64 id, td_api::registerDevice &request) {
 
   CREATE_REQUEST_PROMISE(promise);
   send_closure(device_token_manager_, &DeviceTokenManager::register_device, std::move(request.device_token_),
-               std::move(promise));
+               std::move(request.other_user_ids_), std::move(promise));
 }
 
 void Td::on_request(uint64 id, td_api::getUserPrivacySettingRules &request) {
diff --git a/td/telegram/Td.h b/td/telegram/Td.h
index 415ee5ac..4d38d8dd 100644
--- a/td/telegram/Td.h
+++ b/td/telegram/Td.h
@@ -187,7 +187,7 @@ class Td final : public NetQueryCallback {
   static td_api::object_ptr<td_api::Object> static_request(td_api::object_ptr<td_api::Function> function);
 
  private:
-  static constexpr const char *tdlib_version = "1.0.0";
+  static constexpr const char *tdlib_version = "1.0.1";
   static constexpr int32 ONLINE_TIMEOUT = 240;
 
   void send_result(uint64 id, tl_object_ptr<td_api::Object> object);
diff --git a/td/telegram/cli.cpp b/td/telegram/cli.cpp
index 21731175..fd1b2291 100644
--- a/td/telegram/cli.cpp
+++ b/td/telegram/cli.cpp
@@ -1010,9 +1010,15 @@ class CliClient final : public Actor {
       std::tie(dc_id, ip_port) = split(args);
       send_request(make_tl_object<td_api::processDcUpdate>(dc_id, ip_port));
     } else if (op == "rdb" || op == "RegisterDeviceB") {
-      send_request(make_tl_object<td_api::registerDevice>(make_tl_object<td_api::deviceTokenBlackberryPush>(args)));
+      send_request(make_tl_object<td_api::registerDevice>(make_tl_object<td_api::deviceTokenBlackberryPush>(args),
+                                                          as_user_ids("")));
     } else if (op == "rdu" || op == "RegisterDeviceU") {
-      send_request(make_tl_object<td_api::registerDevice>(make_tl_object<td_api::deviceTokenUbuntuPush>(args)));
+      string token;
+      string other_user_ids_str;
+
+      std::tie(token, other_user_ids_str) = split(args);
+      send_request(make_tl_object<td_api::registerDevice>(make_tl_object<td_api::deviceTokenUbuntuPush>(token),
+                                                          as_user_ids(other_user_ids_str)));
     } else if (op == "gpf") {
       string chat_id;
       string message_id;