diff --git a/wifi/aidl/default/wifi_legacy_hal.cpp b/wifi/aidl/default/wifi_legacy_hal.cpp
index cf86120..55d6f59 100644
--- a/wifi/aidl/default/wifi_legacy_hal.cpp
+++ b/wifi/aidl/default/wifi_legacy_hal.cpp
@@ -1867,8 +1867,9 @@
     return {capabs, status};
 }
 
-wifi_error WifiLegacyHal::twtRegisterEvents(
-        const std::string& ifaceName, const on_twt_failure& on_twt_failure_user_callback,
+wifi_error WifiLegacyHal::twtSessionSetup(
+        const std::string& ifaceName, uint32_t cmdId, const wifi_twt_request& request,
+        const on_twt_failure& on_twt_failure_user_callback,
         const on_twt_session_create& on_twt_session_create_user_callback,
         const on_twt_session_update& on_twt_session_update_user_callback,
         const on_twt_session_teardown& on_twt_session_teardown_user_callback,
@@ -1920,18 +1921,13 @@
         on_twt_session_resume_user_callback(id, session_id);
     };
 
-    return global_func_table_.wifi_twt_register_events(
-            getIfaceHandle(ifaceName),
+    return global_func_table_.wifi_twt_session_setup(
+            cmdId, getIfaceHandle(ifaceName), request,
             {onAsyncTwtError, onAsyncTwtSessionCreate, onAsyncTwtSessionUpdate,
              onAsyncTwtSessionTeardown, onAsyncTwtSessionStats, onAsyncTwtSessionSuspend,
              onAsyncTwtSessionResume});
 }
 
-wifi_error WifiLegacyHal::twtSessionSetup(const std::string& ifaceName, uint32_t cmdId,
-                                          const wifi_twt_request& request) {
-    return global_func_table_.wifi_twt_session_setup(cmdId, getIfaceHandle(ifaceName), request);
-}
-
 wifi_error WifiLegacyHal::twtSessionUpdate(const std::string& ifaceName, uint32_t cmdId,
                                            uint32_t sessionId, const wifi_twt_request& request) {
     return global_func_table_.wifi_twt_session_update(cmdId, getIfaceHandle(ifaceName), sessionId,
diff --git a/wifi/aidl/default/wifi_legacy_hal.h b/wifi/aidl/default/wifi_legacy_hal.h
index 3fd567b..121d1b5 100644
--- a/wifi/aidl/default/wifi_legacy_hal.h
+++ b/wifi/aidl/default/wifi_legacy_hal.h
@@ -780,16 +780,15 @@
 
     // TWT functions
     std::pair<wifi_twt_capabilities, wifi_error> twtGetCapabilities(const std::string& ifaceName);
-    wifi_error twtRegisterEvents(
-            const std::string& ifaceName, const on_twt_failure& on_twt_failure_user_callback,
-            const on_twt_session_create& on_twt_session_create_user_callback,
-            const on_twt_session_update& on_twt_session_update_user_callback,
-            const on_twt_session_teardown& on_twt_session_teardown_user_callback,
-            const on_twt_session_stats& on_twt_session_stats_user_callback,
-            const on_twt_session_suspend& on_twt_session_suspend_user_callback,
-            const on_twt_session_resume& on_twt_session_resume_user_callback);
     wifi_error twtSessionSetup(const std::string& ifaceName, uint32_t cmdId,
-                               const wifi_twt_request& request);
+                               const wifi_twt_request& request,
+                               const on_twt_failure& on_twt_failure_user_callback,
+                               const on_twt_session_create& on_twt_session_create_user_callback,
+                               const on_twt_session_update& on_twt_session_update_user_callback,
+                               const on_twt_session_teardown& on_twt_session_teardown_user_callback,
+                               const on_twt_session_stats& on_twt_session_stats_user_callback,
+                               const on_twt_session_suspend& on_twt_session_suspend_user_callback,
+                               const on_twt_session_resume& on_twt_session_resume_user_callback);
     wifi_error twtSessionUpdate(const std::string& ifaceName, uint32_t cmdId, uint32_t sessionId,
                                 const wifi_twt_request& request);
     wifi_error twtSessionSuspend(const std::string& ifaceName, uint32_t cmdId, uint32_t sessionId);
@@ -798,7 +797,7 @@
     wifi_error twtSessionGetStats(const std::string& ifaceName, uint32_t cmdId, uint32_t sessionId);
 
     // Note: Following TWT functions are deprecated
-    // Deprecated by twtRegisterEvegnts
+    // Deprecated
     wifi_error twtRegisterHandler(const std::string& iface_name,
                                   const TwtCallbackHandlers& handler);
     // Deprecated by twtGetCapabilities
diff --git a/wifi/aidl/default/wifi_legacy_hal_stubs.cpp b/wifi/aidl/default/wifi_legacy_hal_stubs.cpp
index 6e13760..3e4afd0 100644
--- a/wifi/aidl/default/wifi_legacy_hal_stubs.cpp
+++ b/wifi/aidl/default/wifi_legacy_hal_stubs.cpp
@@ -182,7 +182,6 @@
     populateStubFor(&hal_fn->wifi_get_rtt_capabilities_v3);
     populateStubFor(&hal_fn->wifi_rtt_range_request_v3);
     populateStubFor(&hal_fn->wifi_twt_get_capabilities);
-    populateStubFor(&hal_fn->wifi_twt_register_events);
     populateStubFor(&hal_fn->wifi_twt_session_setup);
     populateStubFor(&hal_fn->wifi_twt_session_update);
     populateStubFor(&hal_fn->wifi_twt_session_suspend);
diff --git a/wifi/aidl/default/wifi_sta_iface.cpp b/wifi/aidl/default/wifi_sta_iface.cpp
index 85e373c..aee183d 100644
--- a/wifi/aidl/default/wifi_sta_iface.cpp
+++ b/wifi/aidl/default/wifi_sta_iface.cpp
@@ -31,11 +31,7 @@
 WifiStaIface::WifiStaIface(const std::string& ifname,
                            const std::weak_ptr<legacy_hal::WifiLegacyHal> legacy_hal,
                            const std::weak_ptr<iface_util::WifiIfaceUtil> iface_util)
-    : ifname_(ifname),
-      legacy_hal_(legacy_hal),
-      iface_util_(iface_util),
-      is_valid_(true),
-      is_twt_registered_(false) {
+    : ifname_(ifname), legacy_hal_(legacy_hal), iface_util_(iface_util), is_valid_(true) {
     // Turn on DFS channel usage for STA iface.
     legacy_hal::wifi_error legacy_status = legacy_hal_.lock()->setDfsFlag(ifname_, true);
     if (legacy_status != legacy_hal::WIFI_SUCCESS) {
@@ -270,150 +266,11 @@
     return {ifname_, ndk::ScopedAStatus::ok()};
 }
 
-ndk::ScopedAStatus WifiStaIface::registerTwtEventCallbackInternal() {
-    std::weak_ptr<WifiStaIface> weak_ptr_this = weak_ptr_this_;
-
-    // onTwtFailure callback
-    const auto& on_twt_failure = [weak_ptr_this](legacy_hal::wifi_request_id id,
-                                                 legacy_hal::wifi_twt_error_code error_code) {
-        const auto shared_ptr_this = weak_ptr_this.lock();
-        IWifiStaIfaceEventCallback::TwtErrorCode aidl_error_code =
-                aidl_struct_util::convertLegacyHalTwtErrorCodeToAidl(error_code);
-        if (!shared_ptr_this.get() || !shared_ptr_this->isValid()) {
-            LOG(ERROR) << "Callback invoked on an invalid object";
-            return;
-        }
-        for (const auto& callback : shared_ptr_this->getEventCallbacks()) {
-            if (!callback->onTwtFailure(id, aidl_error_code).isOk()) {
-                LOG(ERROR) << "Failed to invoke onTwtFailure callback";
-            }
-        }
-    };
-    // onTwtSessionCreate callback
-    const auto& on_twt_session_create = [weak_ptr_this](legacy_hal::wifi_request_id id,
-                                                        legacy_hal::wifi_twt_session twt_session) {
-        const auto shared_ptr_this = weak_ptr_this.lock();
-        TwtSession aidl_twt_session;
-        if (!aidl_struct_util::convertLegacyHalTwtSessionToAidl(twt_session, &aidl_twt_session)) {
-            LOG(ERROR) << "convertLegacyHalTwtSessionToAidl failed";
-            return;
-        }
-
-        if (!shared_ptr_this.get() || !shared_ptr_this->isValid()) {
-            LOG(ERROR) << "Callback invoked on an invalid object";
-            return;
-        }
-        for (const auto& callback : shared_ptr_this->getEventCallbacks()) {
-            if (!callback->onTwtSessionCreate(id, aidl_twt_session).isOk()) {
-                LOG(ERROR) << "Failed to invoke onTwtSessionCreate callback";
-            }
-        }
-    };
-    // onTwtSessionUpdate callback
-    const auto& on_twt_session_update = [weak_ptr_this](legacy_hal::wifi_request_id id,
-                                                        legacy_hal::wifi_twt_session twt_session) {
-        const auto shared_ptr_this = weak_ptr_this.lock();
-        TwtSession aidl_twt_session;
-        if (!aidl_struct_util::convertLegacyHalTwtSessionToAidl(twt_session, &aidl_twt_session)) {
-            LOG(ERROR) << "convertLegacyHalTwtSessionToAidl failed";
-            return;
-        }
-
-        if (!shared_ptr_this.get() || !shared_ptr_this->isValid()) {
-            LOG(ERROR) << "Callback invoked on an invalid object";
-            return;
-        }
-        for (const auto& callback : shared_ptr_this->getEventCallbacks()) {
-            if (!callback->onTwtSessionUpdate(id, aidl_twt_session).isOk()) {
-                LOG(ERROR) << "Failed to invoke onTwtSessionUpdate callback";
-            }
-        }
-    };
-    // onTwtSessionTeardown callback
-    const auto& on_twt_session_teardown =
-            [weak_ptr_this](legacy_hal::wifi_request_id id, int session_id,
-                            legacy_hal::wifi_twt_teardown_reason_code reason_code) {
-                const auto shared_ptr_this = weak_ptr_this.lock();
-                IWifiStaIfaceEventCallback::TwtTeardownReasonCode aidl_reason_code =
-                        aidl_struct_util::convertLegacyHalTwtReasonCodeToAidl(reason_code);
-                if (!shared_ptr_this.get() || !shared_ptr_this->isValid()) {
-                    LOG(ERROR) << "Callback invoked on an invalid object";
-                    return;
-                }
-                for (const auto& callback : shared_ptr_this->getEventCallbacks()) {
-                    if (!callback->onTwtSessionTeardown(id, session_id, aidl_reason_code).isOk()) {
-                        LOG(ERROR) << "Failed to invoke onTwtSessionTeardown callback";
-                    }
-                }
-            };
-    // onTwtSessionStats callback
-    const auto& on_twt_session_stats = [weak_ptr_this](legacy_hal::wifi_request_id id,
-                                                       int session_id,
-                                                       legacy_hal::wifi_twt_session_stats stats) {
-        const auto shared_ptr_this = weak_ptr_this.lock();
-        TwtSessionStats aidl_session_stats;
-        if (!aidl_struct_util::convertLegacyHalTwtSessionStatsToAidl(stats, &aidl_session_stats)) {
-            LOG(ERROR) << "convertLegacyHalTwtSessionStatsToAidl failed";
-            return;
-        }
-        if (!shared_ptr_this.get() || !shared_ptr_this->isValid()) {
-            LOG(ERROR) << "Callback invoked on an invalid object";
-            return;
-        }
-        for (const auto& callback : shared_ptr_this->getEventCallbacks()) {
-            if (!callback->onTwtSessionStats(id, session_id, aidl_session_stats).isOk()) {
-                LOG(ERROR) << "Failed to invoke onTwtSessionStats callback";
-            }
-        }
-    };
-    // onTwtSessionSuspend callback
-    const auto& on_twt_session_suspend = [weak_ptr_this](legacy_hal::wifi_request_id id,
-                                                         int session_id) {
-        const auto shared_ptr_this = weak_ptr_this.lock();
-        if (!shared_ptr_this.get() || !shared_ptr_this->isValid()) {
-            LOG(ERROR) << "Callback invoked on an invalid object";
-            return;
-        }
-        for (const auto& callback : shared_ptr_this->getEventCallbacks()) {
-            if (!callback->onTwtSessionSuspend(id, session_id).isOk()) {
-                LOG(ERROR) << "Failed to invoke onTwtSessionSuspend callback";
-            }
-        }
-    };
-    // onTwtSessionResume callback
-    const auto& on_twt_session_resume = [weak_ptr_this](legacy_hal::wifi_request_id id,
-                                                        int session_id) {
-        const auto shared_ptr_this = weak_ptr_this.lock();
-        if (!shared_ptr_this.get() || !shared_ptr_this->isValid()) {
-            LOG(ERROR) << "Callback invoked on an invalid object";
-            return;
-        }
-        for (const auto& callback : shared_ptr_this->getEventCallbacks()) {
-            if (!callback->onTwtSessionResume(id, session_id).isOk()) {
-                LOG(ERROR) << "Failed to invoke onTwtSessionResume callback";
-            }
-        }
-    };
-
-    legacy_hal::wifi_error legacy_status = legacy_hal_.lock()->twtRegisterEvents(
-            ifname_, on_twt_failure, on_twt_session_create, on_twt_session_update,
-            on_twt_session_teardown, on_twt_session_stats, on_twt_session_suspend,
-            on_twt_session_resume);
-
-    if (legacy_status == legacy_hal::WIFI_ERROR_NOT_SUPPORTED) {
-        LOG(INFO) << "twtRegisterEvents is not supported" << legacy_status;
-    } else if (legacy_status != legacy_hal::WIFI_SUCCESS) {
-        LOG(ERROR) << "twtRegisterEvents failed - %d" << legacy_status;
-    }
-    return createWifiStatusFromLegacyError(legacy_status);
-}
-
 ndk::ScopedAStatus WifiStaIface::registerEventCallbackInternal(
         const std::shared_ptr<IWifiStaIfaceEventCallback>& callback) {
     if (!event_cb_handler_.addCallback(callback)) {
         return createWifiStatus(WifiStatusCode::ERROR_UNKNOWN);
     }
-    is_twt_registered_ = registerTwtEventCallbackInternal().isOk();
     return ndk::ScopedAStatus::ok();
 }
 
@@ -760,16 +617,138 @@
 
 ndk::ScopedAStatus WifiStaIface::twtSessionSetupInternal(int32_t cmdId,
                                                          const TwtRequest& aidlTwtRequest) {
-    if (!is_twt_registered_) {
-        LOG(INFO) << "twtSessionSetup is not supported as twtRegisterEvents failed";
-        return createWifiStatus(WifiStatusCode::ERROR_NOT_SUPPORTED);
-    }
     legacy_hal::wifi_twt_request legacyHalTwtRequest;
     if (!aidl_struct_util::convertAidlTwtRequestToLegacy(aidlTwtRequest, &legacyHalTwtRequest)) {
         return createWifiStatus(WifiStatusCode::ERROR_INVALID_ARGS);
     }
-    legacy_hal::wifi_error legacy_status =
-            legacy_hal_.lock()->twtSessionSetup(ifname_, cmdId, legacyHalTwtRequest);
+    std::weak_ptr<WifiStaIface> weak_ptr_this = weak_ptr_this_;
+
+    // onTwtFailure callback
+    const auto& on_twt_failure = [weak_ptr_this](legacy_hal::wifi_request_id id,
+                                                 legacy_hal::wifi_twt_error_code error_code) {
+        const auto shared_ptr_this = weak_ptr_this.lock();
+        IWifiStaIfaceEventCallback::TwtErrorCode aidl_error_code =
+                aidl_struct_util::convertLegacyHalTwtErrorCodeToAidl(error_code);
+        if (!shared_ptr_this.get() || !shared_ptr_this->isValid()) {
+            LOG(ERROR) << "Callback invoked on an invalid object";
+            return;
+        }
+        for (const auto& callback : shared_ptr_this->getEventCallbacks()) {
+            if (!callback->onTwtFailure(id, aidl_error_code).isOk()) {
+                LOG(ERROR) << "Failed to invoke onTwtFailure callback";
+            }
+        }
+    };
+    // onTwtSessionCreate callback
+    const auto& on_twt_session_create = [weak_ptr_this](legacy_hal::wifi_request_id id,
+                                                        legacy_hal::wifi_twt_session twt_session) {
+        const auto shared_ptr_this = weak_ptr_this.lock();
+        TwtSession aidl_twt_session;
+        if (!aidl_struct_util::convertLegacyHalTwtSessionToAidl(twt_session, &aidl_twt_session)) {
+            LOG(ERROR) << "convertLegacyHalTwtSessionToAidl failed";
+            return;
+        }
+
+        if (!shared_ptr_this.get() || !shared_ptr_this->isValid()) {
+            LOG(ERROR) << "Callback invoked on an invalid object";
+            return;
+        }
+        for (const auto& callback : shared_ptr_this->getEventCallbacks()) {
+            if (!callback->onTwtSessionCreate(id, aidl_twt_session).isOk()) {
+                LOG(ERROR) << "Failed to invoke onTwtSessionCreate callback";
+            }
+        }
+    };
+    // onTwtSessionUpdate callback
+    const auto& on_twt_session_update = [weak_ptr_this](legacy_hal::wifi_request_id id,
+                                                        legacy_hal::wifi_twt_session twt_session) {
+        const auto shared_ptr_this = weak_ptr_this.lock();
+        TwtSession aidl_twt_session;
+        if (!aidl_struct_util::convertLegacyHalTwtSessionToAidl(twt_session, &aidl_twt_session)) {
+            LOG(ERROR) << "convertLegacyHalTwtSessionToAidl failed";
+            return;
+        }
+
+        if (!shared_ptr_this.get() || !shared_ptr_this->isValid()) {
+            LOG(ERROR) << "Callback invoked on an invalid object";
+            return;
+        }
+        for (const auto& callback : shared_ptr_this->getEventCallbacks()) {
+            if (!callback->onTwtSessionUpdate(id, aidl_twt_session).isOk()) {
+                LOG(ERROR) << "Failed to invoke onTwtSessionUpdate callback";
+            }
+        }
+    };
+    // onTwtSessionTeardown callback
+    const auto& on_twt_session_teardown =
+            [weak_ptr_this](legacy_hal::wifi_request_id id, int session_id,
+                            legacy_hal::wifi_twt_teardown_reason_code reason_code) {
+                const auto shared_ptr_this = weak_ptr_this.lock();
+                IWifiStaIfaceEventCallback::TwtTeardownReasonCode aidl_reason_code =
+                        aidl_struct_util::convertLegacyHalTwtReasonCodeToAidl(reason_code);
+                if (!shared_ptr_this.get() || !shared_ptr_this->isValid()) {
+                    LOG(ERROR) << "Callback invoked on an invalid object";
+                    return;
+                }
+                for (const auto& callback : shared_ptr_this->getEventCallbacks()) {
+                    if (!callback->onTwtSessionTeardown(id, session_id, aidl_reason_code).isOk()) {
+                        LOG(ERROR) << "Failed to invoke onTwtSessionTeardown callback";
+                    }
+                }
+            };
+    // onTwtSessionStats callback
+    const auto& on_twt_session_stats = [weak_ptr_this](legacy_hal::wifi_request_id id,
+                                                       int session_id,
+                                                       legacy_hal::wifi_twt_session_stats stats) {
+        const auto shared_ptr_this = weak_ptr_this.lock();
+        TwtSessionStats aidl_session_stats;
+        if (!aidl_struct_util::convertLegacyHalTwtSessionStatsToAidl(stats, &aidl_session_stats)) {
+            LOG(ERROR) << "convertLegacyHalTwtSessionStatsToAidl failed";
+            return;
+        }
+        if (!shared_ptr_this.get() || !shared_ptr_this->isValid()) {
+            LOG(ERROR) << "Callback invoked on an invalid object";
+            return;
+        }
+        for (const auto& callback : shared_ptr_this->getEventCallbacks()) {
+            if (!callback->onTwtSessionStats(id, session_id, aidl_session_stats).isOk()) {
+                LOG(ERROR) << "Failed to invoke onTwtSessionStats callback";
+            }
+        }
+    };
+    // onTwtSessionSuspend callback
+    const auto& on_twt_session_suspend = [weak_ptr_this](legacy_hal::wifi_request_id id,
+                                                         int session_id) {
+        const auto shared_ptr_this = weak_ptr_this.lock();
+        if (!shared_ptr_this.get() || !shared_ptr_this->isValid()) {
+            LOG(ERROR) << "Callback invoked on an invalid object";
+            return;
+        }
+        for (const auto& callback : shared_ptr_this->getEventCallbacks()) {
+            if (!callback->onTwtSessionSuspend(id, session_id).isOk()) {
+                LOG(ERROR) << "Failed to invoke onTwtSessionSuspend callback";
+            }
+        }
+    };
+    // onTwtSessionResume callback
+    const auto& on_twt_session_resume = [weak_ptr_this](legacy_hal::wifi_request_id id,
+                                                        int session_id) {
+        const auto shared_ptr_this = weak_ptr_this.lock();
+        if (!shared_ptr_this.get() || !shared_ptr_this->isValid()) {
+            LOG(ERROR) << "Callback invoked on an invalid object";
+            return;
+        }
+        for (const auto& callback : shared_ptr_this->getEventCallbacks()) {
+            if (!callback->onTwtSessionResume(id, session_id).isOk()) {
+                LOG(ERROR) << "Failed to invoke onTwtSessionResume callback";
+            }
+        }
+    };
+
+    legacy_hal::wifi_error legacy_status = legacy_hal_.lock()->twtSessionSetup(
+            ifname_, cmdId, legacyHalTwtRequest, on_twt_failure, on_twt_session_create,
+            on_twt_session_update, on_twt_session_teardown, on_twt_session_stats,
+            on_twt_session_suspend, on_twt_session_resume);
     return createWifiStatusFromLegacyError(legacy_status);
 }
 
diff --git a/wifi/aidl/default/wifi_sta_iface.h b/wifi/aidl/default/wifi_sta_iface.h
index 5713928..eb8f745 100644
--- a/wifi/aidl/default/wifi_sta_iface.h
+++ b/wifi/aidl/default/wifi_sta_iface.h
@@ -103,7 +103,6 @@
   private:
     // Corresponding worker functions for the AIDL methods.
     std::pair<std::string, ndk::ScopedAStatus> getNameInternal();
-    ndk::ScopedAStatus registerTwtEventCallbackInternal();
     ndk::ScopedAStatus registerEventCallbackInternal(
             const std::shared_ptr<IWifiStaIfaceEventCallback>& callback);
     std::pair<int32_t, ndk::ScopedAStatus> getFeatureSetInternal();
@@ -158,7 +157,6 @@
     std::weak_ptr<WifiStaIface> weak_ptr_this_;
     bool is_valid_;
     aidl_callback_util::AidlCallbackHandler<IWifiStaIfaceEventCallback> event_cb_handler_;
-    bool is_twt_registered_;
 
     DISALLOW_COPY_AND_ASSIGN(WifiStaIface);
 };