diff --git a/frontend/src/App.svelte b/frontend/src/App.svelte
index 9131a88..764e832 100644
--- a/frontend/src/App.svelte
+++ b/frontend/src/App.svelte
@@ -1,5 +1,5 @@
 <script>
-  import { onMount, setContext } from "svelte";
+  import { onMount, setContext, tick } from "svelte";
   import { createAuthStore } from "./lib/webapp/stores/authStore.js";
   import { createBillingStore } from "./lib/webapp/stores/billingStore.js";
   import { createDevicesStore } from "./lib/webapp/stores/devicesStore.js";
@@ -7,8 +7,11 @@
   import { createSupportStore } from "./lib/webapp/stores/supportStore.js";
   import { createAccountStore } from "./lib/webapp/stores/accountStore.js";
   import { Tooltip } from "$components/ui/primitives.js";
+  import { CheckCircle2 } from "$components/ui/icons.js";
 
   import BrandMark from "$lib/webapp/BrandMark.svelte";
+  import Button from "$components/ui/button.svelte";
+  import Dialog from "$components/ui/dialog.svelte";
   import PreviewBoard from "./PreviewBoard.svelte";
   import WebAppShell from "./webapp/WebAppShell.svelte";
   import AuthScreen from "./webapp/auth/AuthScreen.svelte";
@@ -121,6 +124,8 @@
   let trialBusy = false;
   let trialActivationResult = null;
   let trialActivationError = "";
+  let activationSuccessDialogOpen = false;
+  let activationSuccessUseInstallGuides = false;
   let promoCode = "";
   let promoBusy = false;
   let promoStatus = "";
@@ -199,6 +204,7 @@
     t,
     showToast,
     openExternalLink,
+    onSubscriptionActivated: handleSubscriptionActivated,
     tg,
   });
   const devicesStore = createDevicesStore({ api, t, showToast });
@@ -1172,6 +1178,56 @@
     openConnectLink();
   }
 
+  function openActivationConnectLink() {
+    const url =
+      subscription?.connect_url ||
+      subscription?.config_link ||
+      trialActivationResult?.connect_url ||
+      trialActivationResult?.config_link;
+    if (!url) {
+      showToast(t("wa_connect_link_unavailable"));
+      return;
+    }
+    openExternalLink(url);
+  }
+
+  function navigateToActivationTarget({ replace = true } = {}) {
+    const useInstallGuides = canUseInstallGuides();
+    activationSuccessUseInstallGuides = useInstallGuides;
+    billingStore.closePaymentModal();
+    activeTab = "home";
+    if (useInstallGuides) {
+      screen = "install";
+      syncSectionPath("install", replace);
+      installGuidesStore.load(true);
+      return;
+    }
+    screen = "home";
+    syncSectionPath("home", replace);
+  }
+
+  async function showActivationSuccessDialog() {
+    await tick();
+    navigateToActivationTarget({ replace: true });
+    activationSuccessDialogOpen = true;
+  }
+
+  async function handleSubscriptionActivated() {
+    await tick();
+    if (!subscription?.active) return;
+    await showActivationSuccessDialog();
+  }
+
+  function closeActivationSuccessDialog() {
+    const shouldOpenConnect = !activationSuccessUseInstallGuides;
+    activationSuccessDialogOpen = false;
+    if (activationSuccessUseInstallGuides) {
+      navigateToActivationTarget({ replace: true });
+      return;
+    }
+    if (shouldOpenConnect) openActivationConnectLink();
+  }
+
   async function copyText(value, success = t("wa_copied")) {
     if (!value) {
       showToast(t("wa_unavailable"));
@@ -1220,9 +1276,8 @@
     }
   }
 
-  async function activateTrial(options = {}) {
+  async function activateTrial() {
     if (trialBusy) return;
-    const stayOnTrial = Boolean(options?.stayOnTrial);
     trialBusy = true;
     trialActivationResult = null;
     trialActivationError = "";
@@ -1235,11 +1290,7 @@
       trialActivationResult = response;
       showToast(t("wa_trial_activated"));
       await loadData();
-      if (stayOnTrial) {
-        activeTab = "home";
-        screen = "trial";
-        syncSectionPath("trial", true);
-      }
+      await showActivationSuccessDialog();
     } catch (error) {
       const message = error?.message || t("wa_trial_activation_failed");
       trialActivationError = message;
@@ -1788,6 +1839,34 @@
             {trafficMode}
             {t}
           />
+
+          <Dialog
+            open={activationSuccessDialogOpen}
+            title={t("wa_activation_success_title", {}, "Everything is successfully activated")}
+            description={activationSuccessUseInstallGuides
+              ? t(
+                  "wa_activation_success_install_hint",
+                  {},
+                  "Press OK and follow the setup instructions for your device."
+                )
+              : t(
+                  "wa_activation_success_connect_hint",
+                  {},
+                  "Press OK and we will open the Remnawave subscription page for setup."
+                )}
+            closeLabel={t("wa_close")}
+            onclose={closeActivationSuccessDialog}
+            class="activation-success-dialog"
+          >
+            <div class="activation-success-dialog-body">
+              <div class="activation-success-mark" aria-hidden="true">
+                <CheckCircle2 size={34} />
+              </div>
+              <Button class="wide" onclick={closeActivationSuccessDialog}>
+                {t("wa_ok", {}, "OK")}
+              </Button>
+            </div>
+          </Dialog>
         {/if}
 
         {#if toastText}
diff --git a/frontend/src/lib/webapp/stores/billingStore.js b/frontend/src/lib/webapp/stores/billingStore.js
index 36d812b..326968b 100644
--- a/frontend/src/lib/webapp/stores/billingStore.js
+++ b/frontend/src/lib/webapp/stores/billingStore.js
@@ -1,12 +1,21 @@
 import { writable, get } from "svelte/store";
 
-export function createBillingStore({ billing, loadData, t, showToast, openExternalLink, tg }) {
+export function createBillingStore({
+  billing,
+  loadData,
+  t,
+  showToast,
+  openExternalLink,
+  onSubscriptionActivated = null,
+  tg,
+}) {
   const state = writable({
     paymentModalOpen: false,
     paymentStep: "tariff",
     selectedTariffKey: "",
     selectedPlan: null,
     selectedMethod: "",
+    paymentStartedWithActiveSubscription: false,
     topupModalOpen: false,
     topupKind: "regular",
     deviceTopupModalOpen: false,
@@ -25,11 +34,44 @@ export function createBillingStore({ billing, loadData, t, showToast, openExtern
 
   let topupOptionsRequestId = 0;
   let paymentPollToken = 0;
+  const successfulPaymentIds = new Set();
 
   function sleep(ms) {
     return new Promise((resolve) => setTimeout(resolve, ms));
   }
 
+  function isSubscriptionSale(plan) {
+    const saleMode = String(plan?.sale_mode || "subscription").toLowerCase();
+    return !["traffic", "traffic_package", "topup", "premium_topup", "hwid_devices"].includes(
+      saleMode
+    );
+  }
+
+  function paymentSuccessContext(s, response = {}) {
+    return {
+      paymentId: response.payment_id || "",
+      initialSubscriptionPayment:
+        !s.paymentStartedWithActiveSubscription && isSubscriptionSale(s.selectedPlan),
+    };
+  }
+
+  async function handlePaymentSuccess(successContext = {}) {
+    const paymentId = String(successContext.paymentId || "");
+    if (paymentId && successfulPaymentIds.has(paymentId)) return;
+    if (paymentId) {
+      successfulPaymentIds.add(paymentId);
+      paymentPollToken += 1;
+    }
+    showToast(t("wa_payment_success", {}, "Payment successful"));
+    await loadData();
+    if (
+      successContext.initialSubscriptionPayment &&
+      typeof onSubscriptionActivated === "function"
+    ) {
+      await onSubscriptionActivated();
+    }
+  }
+
   function openPaymentModal(
     tariffMode,
     singleTariffMode,
@@ -71,6 +113,7 @@ export function createBillingStore({ billing, loadData, t, showToast, openExtern
         selectedTariffKey: tariffKey,
         selectedPlan: plan,
         selectedMethod: s.selectedMethod || defaultMethod,
+        paymentStartedWithActiveSubscription: Boolean(subscription?.active),
       };
     });
   }
@@ -164,13 +207,12 @@ export function createBillingStore({ billing, loadData, t, showToast, openExtern
     state.update((s) => ({ ...s, changeConfirmOpen: false }));
   }
 
-  function openTelegramInvoice(url) {
+  function openTelegramInvoice(url, successContext = {}) {
     if (!url) return;
     if (tg?.openInvoice) {
-      tg.openInvoice(url, (status) => {
+      tg.openInvoice(url, async (status) => {
         if (status === "paid") {
-          showToast(t("wa_payment_success", {}, "Payment successful"));
-          loadData();
+          await handlePaymentSuccess(successContext);
         } else if (status === "failed") {
           showToast(t("wa_payment_create_failed"));
         }
@@ -180,7 +222,7 @@ export function createBillingStore({ billing, loadData, t, showToast, openExtern
     openExternalLink(url);
   }
 
-  function startPaymentStatusPolling(paymentId) {
+  function startPaymentStatusPolling(paymentId, successContext = {}) {
     if (!paymentId || !billing.fetchPaymentStatus) return;
     const token = ++paymentPollToken;
     void (async () => {
@@ -191,8 +233,7 @@ export function createBillingStore({ billing, loadData, t, showToast, openExtern
           const status = await billing.fetchPaymentStatus(paymentId);
           if (!status?.ok) continue;
           if (status.paid || status.status === "succeeded") {
-            showToast(t("wa_payment_success", {}, "Payment successful"));
-            await loadData();
+            await handlePaymentSuccess({ ...successContext, paymentId });
             return;
           }
           const normalized = String(status.status || "").toLowerCase();
@@ -222,17 +263,19 @@ export function createBillingStore({ billing, loadData, t, showToast, openExtern
       );
       if (!response.ok) throw response;
       showToast(t("wa_payment_created"));
+      const successContext = paymentSuccessContext(s, response);
       if (response.action === "open_invoice") {
         if (!response.payment_url) throw response;
-        openTelegramInvoice(response.payment_url);
+        openTelegramInvoice(response.payment_url, successContext);
       } else if (response.action === "invoice_sent") {
+        startPaymentStatusPolling(response.payment_id, successContext);
         state.update((s) => ({ ...s, paymentModalOpen: false }));
         return;
       } else {
         if (!response.payment_url) throw response;
         openExternalLink(response.payment_url);
       }
-      startPaymentStatusPolling(response.payment_id);
+      startPaymentStatusPolling(response.payment_id, successContext);
       state.update((s) => ({ ...s, paymentModalOpen: false }));
     } catch (error) {
       showToast(error?.message || t("wa_payment_create_failed"));
diff --git a/frontend/src/styles/dialogs.css b/frontend/src/styles/dialogs.css
index f08be8b..8de38e7 100644
--- a/frontend/src/styles/dialogs.css
+++ b/frontend/src/styles/dialogs.css
@@ -78,6 +78,34 @@
   gap: 10px;
 }
 
+.activation-success-dialog {
+  width: min(100%, 440px);
+}
+
+.activation-success-dialog-body {
+  display: grid;
+  justify-items: center;
+  gap: 16px;
+}
+
+.activation-success-mark {
+  display: grid;
+  width: 70px;
+  height: 70px;
+  place-items: center;
+  border: 1px solid color-mix(in srgb, var(--success) 38%, transparent);
+  border-radius: 50%;
+  background:
+    radial-gradient(circle at 30% 25%, color-mix(in srgb, white 42%, transparent), transparent 34%),
+    color-mix(in srgb, var(--success) 16%, var(--panel));
+  color: var(--success);
+  box-shadow: 0 18px 38px color-mix(in srgb, var(--success) 20%, transparent);
+}
+
+.activation-success-dialog-body .btn {
+  width: 100%;
+}
+
 .payment-divider {
   height: 1px;
   width: 100%;
diff --git a/frontend/src/webapp/screens/TrialActivationScreen.svelte b/frontend/src/webapp/screens/TrialActivationScreen.svelte
index c2be28b..f90c5e6 100644
--- a/frontend/src/webapp/screens/TrialActivationScreen.svelte
+++ b/frontend/src/webapp/screens/TrialActivationScreen.svelte
@@ -56,7 +56,7 @@
   onMount(() => {
     if (!requested && canRequestTrial) {
       requested = true;
-      activateTrial({ stayOnTrial: true });
+      activateTrial();
     }
   });
 </script>
@@ -139,11 +139,7 @@
         {t("wa_install_and_configure")}
       </Button>
     {:else if trialError && canRequestTrial}
-      <Button
-        class="wide"
-        onclick={() => activateTrial({ stayOnTrial: true })}
-        disabled={trialBusy}
-      >
+      <Button class="wide" onclick={activateTrial} disabled={trialBusy}>
         <RefreshCw size={18} />
         {t("wa_trial_retry", {}, "Try again")}
       </Button>
diff --git a/locales/en.json b/locales/en.json
index b9b0c6c..ebd17f7 100644
--- a/locales/en.json
+++ b/locales/en.json
@@ -754,6 +754,9 @@
   "wa_trial_download_traffic_label": "Available to download",
   "wa_trial_try_free": "Try for free",
   "wa_trial_activated": "Trial activated",
+  "wa_activation_success_title": "Everything is successfully activated",
+  "wa_activation_success_install_hint": "Press OK and follow the setup instructions for your device.",
+  "wa_activation_success_connect_hint": "Press OK and we will open the Remnawave subscription page for setup.",
   "wa_trial_activation_failed": "Failed to activate trial",
   "wa_trial_activation_loading": "Activating trial...",
   "wa_trial_activation_wait": "Preparing access and connection details.",
@@ -821,6 +824,7 @@
   "wa_device_disconnected": "Device disconnected",
   "wa_device_disconnect_failed": "Failed to disconnect device",
   "wa_cancel": "Cancel",
+  "wa_ok": "OK",
   "wa_payment_created": "Payment created",
   "wa_payment_create_failed": "Failed to create payment",
   "wa_connect_link_unavailable": "Connection link is not available yet",
diff --git a/locales/ru.json b/locales/ru.json
index 094028f..d5925f9 100644
--- a/locales/ru.json
+++ b/locales/ru.json
@@ -754,6 +754,9 @@
   "wa_trial_download_traffic_label": "Доступно для скачивания",
   "wa_trial_try_free": "Попробовать бесплатно",
   "wa_trial_activated": "Пробный период активирован",
+  "wa_activation_success_title": "Всё успешно активировано",
+  "wa_activation_success_install_hint": "Нажмите ОК и следуйте инструкциям по установке на вашем устройстве.",
+  "wa_activation_success_connect_hint": "Нажмите ОК, и мы откроем страницу подписки Remnawave для настройки устройства.",
   "wa_trial_activation_failed": "Не удалось активировать пробный период",
   "wa_trial_activation_loading": "Активируем пробный период...",
   "wa_trial_activation_wait": "Готовим доступ и данные для подключения.",
@@ -821,6 +824,7 @@
   "wa_device_disconnected": "Устройство отключено",
   "wa_device_disconnect_failed": "Не удалось отключить устройство",
   "wa_cancel": "Отмена",
+  "wa_ok": "ОК",
   "wa_payment_created": "Платеж создан",
   "wa_payment_create_failed": "Не удалось создать платеж",
   "wa_connect_link_unavailable": "Ссылка для подключения пока недоступна",