diff --git a/meshchatx/meshchat.py b/meshchatx/meshchat.py
index af44548f..9fa317f8 100644
--- a/meshchatx/meshchat.py
+++ b/meshchatx/meshchat.py
@@ -5157,7 +5157,8 @@ class ReticulumMeshChat:
                         {
                             "message": (
                                 "RNode serial and Bluetooth are not available on this device. "
-                                "On Android, the app must include usbserial4a (see MeshChatX issue #6)."
+                                "On Android, the app must include usbserial4a and jnius "
+                                "(see MeshChatX issue #6)."
                             ),
                         },
                         status=422,
diff --git a/meshchatx/src/backend/rrc/manager.py b/meshchatx/src/backend/rrc/manager.py
index 26cee162..de5aa8cc 100644
--- a/meshchatx/src/backend/rrc/manager.py
+++ b/meshchatx/src/backend/rrc/manager.py
@@ -482,9 +482,22 @@ class RRCHub:
     def set_auto_list(self, enabled, save=True):
         with self._lock:
             self.auto_list = bool(enabled)
+            should_list = self.auto_list and self.welcomed
         if save:
             self.manager.save()
         self.manager._notify_change(self)
+        if should_list:
+            self._request_room_list()
+
+    def _request_room_list(self):
+        try:
+            with self._lock:
+                self._silent_list_pending += 1
+            self.send_command("/list", room=None, record_local=False)
+        except Exception:
+            with self._lock:
+                if self._silent_list_pending > 0:
+                    self._silent_list_pending -= 1
 
     def set_auto_who(self, enabled, save=True):
         with self._lock:
@@ -950,14 +963,7 @@ class RRCHub:
             self._reconnect_attempts = 0
         self.manager._on_welcome(self)
         if self.auto_list:
-            try:
-                with self._lock:
-                    self._silent_list_pending += 1
-                self.send_command("/list", room=None, record_local=False)
-            except Exception:
-                with self._lock:
-                    if self._silent_list_pending > 0:
-                        self._silent_list_pending -= 1
+            self._request_room_list()
 
     def _apply_limits(self, limits):
         if proto.L_MAX_NICK_BYTES in limits:
diff --git a/meshchatx/src/frontend/components/relay/RelayChatPage.vue b/meshchatx/src/frontend/components/relay/RelayChatPage.vue
index a84cedc3..6e9694b7 100644
--- a/meshchatx/src/frontend/components/relay/RelayChatPage.vue
+++ b/meshchatx/src/frontend/components/relay/RelayChatPage.vue
@@ -236,13 +236,46 @@
                                         </span>
                                     </li>
                                     <li
-                                        v-if="orderedRoomsFor(hub).length === 0"
+                                        v-if="orderedRoomsFor(hub).length === 0 && availableRoomsFor(hub).length === 0"
                                         class="px-2.5 py-1 text-xs text-sem-fg-muted"
                                     >
                                         {{ $t("relay_chat.no_rooms") }}
                                     </li>
                                 </ul>
 
+                                <div v-if="availableRoomsFor(hub).length > 0" class="space-y-0.5">
+                                    <div
+                                        class="px-2.5 pt-1 text-[10px] font-semibold uppercase tracking-wide text-sem-fg-muted"
+                                    >
+                                        {{ $t("relay_chat.available_rooms") }}
+                                    </div>
+                                    <ul class="space-y-0.5">
+                                        <li
+                                            v-for="availableRoom in availableRoomsFor(hub)"
+                                            :key="availableRoom.name"
+                                            :title="availableRoom.topic || ''"
+                                            class="flex items-center justify-between gap-2 rounded-lg px-2.5 py-1.5 text-sm cursor-pointer text-sem-fg-muted transition-colors hover:bg-sem-surface/60 dark:hover:bg-sem-surface/30"
+                                            @click="joinAvailableRoom(hub, availableRoom.name)"
+                                        >
+                                            <span class="flex min-w-0 items-center gap-1.5">
+                                                <MaterialDesignIcon
+                                                    icon-name="pound"
+                                                    class="size-3.5 shrink-0 opacity-40"
+                                                />
+                                                <span class="truncate">{{ availableRoom.name }}</span>
+                                            </span>
+                                            <button
+                                                type="button"
+                                                :class="btnIconSm"
+                                                :title="$t('relay_chat.join')"
+                                                @click.stop="joinAvailableRoom(hub, availableRoom.name)"
+                                            >
+                                                <MaterialDesignIcon icon-name="plus" class="size-3.5" />
+                                            </button>
+                                        </li>
+                                    </ul>
+                                </div>
+
                                 <form class="flex gap-1.5" @submit.prevent="joinRoom(hub)">
                                     <input
                                         v-model="joinRoomName"
@@ -1388,6 +1421,16 @@ export default {
             }
             return hub.known_rooms;
         },
+        availableRoomsFor(hub) {
+            if (!hub || !hub.available_rooms || typeof hub.available_rooms !== "object") {
+                return [];
+            }
+            const known = new Set(this.orderedRoomsFor(hub));
+            return Object.entries(hub.available_rooms)
+                .filter(([name]) => !known.has(name))
+                .map(([name, topic]) => ({ name, topic }))
+                .sort((a, b) => a.name.localeCompare(b.name));
+        },
         onCollapsedHubClick(hub) {
             const rooms = this.orderedRoomsFor(hub);
             this.selectedHubHash = hub.hub_hash;
@@ -2032,13 +2075,23 @@ export default {
                 ToastUtils.warning(this.$t("relay_chat.room_required"));
                 return;
             }
+            const joined = await this.joinRoomByName(hub, room);
+            if (joined) {
+                this.joinRoomName = "";
+            }
+        },
+        async joinAvailableRoom(hub, room) {
+            await this.joinRoomByName(hub, room);
+        },
+        async joinRoomByName(hub, room) {
             try {
                 await window.api.post(`/api/v1/rrc/hubs/${hub.hub_hash}/rooms`, { room });
-                this.joinRoomName = "";
                 ToastUtils.success(this.$t("relay_chat.joined_room"));
                 await this.fetchHubs();
+                return true;
             } catch (e) {
                 ToastUtils.error(e.response?.data?.message || this.$t("relay_chat.action_failed"));
+                return false;
             }
         },
         async leaveRoom() {
diff --git a/meshchatx/src/frontend/locales/de.json b/meshchatx/src/frontend/locales/de.json
index 9bae63b7..e8bdb727 100644
--- a/meshchatx/src/frontend/locales/de.json
+++ b/meshchatx/src/frontend/locales/de.json
@@ -2904,6 +2904,8 @@
         "dest_name": "Ziel-Aspekt (optional)",
         "no_hubs": "Noch keine Hubs konfiguriert. Fügen Sie einen hinzu, um zu beginnen.",
         "no_rooms": "Keine Räume beigetreten. Treten Sie einem Raum bei, um zu chatten.",
+        "available_rooms": "Verfügbare Räume",
+        "join": "Beitreten",
         "no_room_selected": "Wählen Sie einen Raum, um Nachrichten anzuzeigen.",
         "load_previous": "Frühere Nachrichten laden",
         "rooms": "Räume",
diff --git a/meshchatx/src/frontend/locales/en.json b/meshchatx/src/frontend/locales/en.json
index 8cd50789..55eb4a92 100644
--- a/meshchatx/src/frontend/locales/en.json
+++ b/meshchatx/src/frontend/locales/en.json
@@ -2263,6 +2263,8 @@
         "dest_name": "Destination Aspect (optional)",
         "no_hubs": "No hubs configured yet. Add one to get started.",
         "no_rooms": "No rooms joined. Join a room to start chatting.",
+        "available_rooms": "Available Rooms",
+        "join": "Join",
         "no_room_selected": "Select a room to view messages.",
         "load_previous": "Load earlier messages",
         "rooms": "Rooms",
diff --git a/meshchatx/src/frontend/locales/es.json b/meshchatx/src/frontend/locales/es.json
index 8d794557..093e0cfd 100644
--- a/meshchatx/src/frontend/locales/es.json
+++ b/meshchatx/src/frontend/locales/es.json
@@ -2904,6 +2904,8 @@
         "dest_name": "Aspecto de destino (opcional)",
         "no_hubs": "Aun no hay hubs configurados. Anade uno para empezar.",
         "no_rooms": "No te has unido a ninguna sala. Unete a una para chatear.",
+        "available_rooms": "Salas disponibles",
+        "join": "Unirse",
         "no_room_selected": "Selecciona una sala para ver los mensajes.",
         "load_previous": "Cargar mensajes anteriores",
         "rooms": "Salas",
diff --git a/meshchatx/src/frontend/locales/fi.json b/meshchatx/src/frontend/locales/fi.json
index 89581490..2ceafb79 100644
--- a/meshchatx/src/frontend/locales/fi.json
+++ b/meshchatx/src/frontend/locales/fi.json
@@ -2263,6 +2263,8 @@
         "dest_name": "Destination Aspect (optional)",
         "no_hubs": "No hubs configured yet. Add one to get started.",
         "no_rooms": "No rooms joined. Join a room to start chatting.",
+        "available_rooms": "Available Rooms",
+        "join": "Join",
         "no_room_selected": "Select a room to view messages.",
         "load_previous": "Load earlier messages",
         "rooms": "Rooms",
diff --git a/meshchatx/src/frontend/locales/fr.json b/meshchatx/src/frontend/locales/fr.json
index 43c6d35b..b62fcaa9 100644
--- a/meshchatx/src/frontend/locales/fr.json
+++ b/meshchatx/src/frontend/locales/fr.json
@@ -2904,6 +2904,8 @@
         "dest_name": "Aspect de destination (optionnel)",
         "no_hubs": "Aucun hub configure. Ajoutez-en un pour commencer.",
         "no_rooms": "Aucun salon rejoint. Rejoignez un salon pour discuter.",
+        "available_rooms": "Salons disponibles",
+        "join": "Rejoindre",
         "no_room_selected": "Selectionnez un salon pour voir les messages.",
         "load_previous": "Charger les messages precedents",
         "rooms": "Salons",
diff --git a/meshchatx/src/frontend/locales/it.json b/meshchatx/src/frontend/locales/it.json
index ef2c24e9..282656ff 100644
--- a/meshchatx/src/frontend/locales/it.json
+++ b/meshchatx/src/frontend/locales/it.json
@@ -2904,6 +2904,8 @@
         "dest_name": "Aspetto di destinazione (opzionale)",
         "no_hubs": "Nessun hub configurato. Aggiungine uno per iniziare.",
         "no_rooms": "Nessuna stanza. Entra in una stanza per chattare.",
+        "available_rooms": "Stanze disponibili",
+        "join": "Entra",
         "no_room_selected": "Seleziona una stanza per vedere i messaggi.",
         "load_previous": "Carica messaggi precedenti",
         "rooms": "Stanze",
diff --git a/meshchatx/src/frontend/locales/nl.json b/meshchatx/src/frontend/locales/nl.json
index e4000d71..3ba22289 100644
--- a/meshchatx/src/frontend/locales/nl.json
+++ b/meshchatx/src/frontend/locales/nl.json
@@ -2904,6 +2904,8 @@
         "dest_name": "Bestemmingsaspect (optioneel)",
         "no_hubs": "Nog geen hubs geconfigureerd. Voeg er een toe om te beginnen.",
         "no_rooms": "Geen kamers. Word lid van een kamer om te chatten.",
+        "available_rooms": "Beschikbare kamers",
+        "join": "Deelnemen",
         "no_room_selected": "Selecteer een kamer om berichten te bekijken.",
         "load_previous": "Eerdere berichten laden",
         "rooms": "Kamers",
diff --git a/meshchatx/src/frontend/locales/ru.json b/meshchatx/src/frontend/locales/ru.json
index 01ff4f23..00b39dd9 100644
--- a/meshchatx/src/frontend/locales/ru.json
+++ b/meshchatx/src/frontend/locales/ru.json
@@ -2904,6 +2904,8 @@
         "dest_name": "Аспект назначения (необязательно)",
         "no_hubs": "Хабы ещё не настроены. Добавьте один, чтобы начать.",
         "no_rooms": "Нет комнат. Присоединитесь к комнате, чтобы общаться.",
+        "available_rooms": "Доступные комнаты",
+        "join": "Присоединиться",
         "no_room_selected": "Выберите комнату для просмотра сообщений.",
         "load_previous": "Загрузить более ранние сообщения",
         "rooms": "Комнаты",
diff --git a/meshchatx/src/frontend/locales/zh.json b/meshchatx/src/frontend/locales/zh.json
index 9461de04..c9ec279b 100644
--- a/meshchatx/src/frontend/locales/zh.json
+++ b/meshchatx/src/frontend/locales/zh.json
@@ -2904,6 +2904,8 @@
         "dest_name": "目标方面（可选）",
         "no_hubs": "尚未配置中心。添加一个以开始。",
         "no_rooms": "未加入任何房间。加入房间开始聊天。",
+        "available_rooms": "可用房间",
+        "join": "加入",
         "no_room_selected": "选择一个房间以查看消息。",
         "load_previous": "加载更早的消息",
         "rooms": "房间",
diff --git a/tests/backend/test_rrc_protocol.py b/tests/backend/test_rrc_protocol.py
index 93b92a83..6062eb4f 100644
--- a/tests/backend/test_rrc_protocol.py
+++ b/tests/backend/test_rrc_protocol.py
@@ -251,6 +251,42 @@ def test_hub_notice_updates_room_list(tmp_path):
     assert hub.available_rooms == {"lobby": "Main", "random": None}
 
 
+def test_welcome_sends_list_when_auto_list_enabled(tmp_path):
+    manager = make_manager(tmp_path)
+    hub = manager.add_hub(bytes(range(16)))
+    hub.auto_list = True
+    calls = []
+    hub.send_command = lambda text, room=None, record_local=True: calls.append(text)
+
+    hub._handle_welcome({})
+
+    assert calls == ["/list"]
+
+
+def test_set_auto_list_requests_list_immediately_when_already_connected(tmp_path):
+    """Enabling auto-list mid-session must not require a reconnect to take effect."""
+    manager = make_manager(tmp_path)
+    hub = manager.add_hub(bytes(range(16)))
+    hub.welcomed = True
+    calls = []
+    hub.send_command = lambda text, room=None, record_local=True: calls.append(text)
+
+    hub.set_auto_list(True)
+
+    assert calls == ["/list"]
+
+
+def test_set_auto_list_does_not_list_before_hub_is_connected(tmp_path):
+    manager = make_manager(tmp_path)
+    hub = manager.add_hub(bytes(range(16)))
+    calls = []
+    hub.send_command = lambda text, room=None, record_local=True: calls.append(text)
+
+    hub.set_auto_list(True)
+
+    assert calls == []
+
+
 def test_history_is_persisted_and_reloaded(tmp_path):
     manager = make_manager(tmp_path)
     hub = manager.add_hub(bytes(range(16)))
diff --git a/tests/frontend/RelayChatPage.test.js b/tests/frontend/RelayChatPage.test.js
index ff2a67d5..15f9124f 100644
--- a/tests/frontend/RelayChatPage.test.js
+++ b/tests/frontend/RelayChatPage.test.js
@@ -130,6 +130,52 @@ describe("RelayChatPage.vue", () => {
         expect(wrapper.vm.selectedHubHash).toBe(HUB_HASH);
     });
 
+    it("shows hub rooms discovered via auto-list that have not been joined yet", async () => {
+        axiosMock.get.mockImplementation((url) => {
+            if (url === "/api/v1/rrc/hubs") {
+                return Promise.resolve({
+                    data: { hubs: [makeHub({ available_rooms: { lobby: "Main", random: null } })] },
+                });
+            }
+            if (url === "/api/v1/rrc/servers") {
+                return Promise.resolve({ data: { hubs: [makeHostedHub()] } });
+            }
+            if (url === "/api/v1/announces") {
+                return Promise.resolve({ data: { announces: [makeAnnounce()] } });
+            }
+            return Promise.resolve({ data: {} });
+        });
+        const wrapper = mountPage();
+        await vi.waitFor(() => expect(wrapper.vm.hubs.length).toBe(1));
+
+        // "lobby" is already joined (known_rooms), so only "random" is unjoined.
+        expect(wrapper.vm.availableRoomsFor(wrapper.vm.hubs[0])).toEqual([{ name: "random", topic: null }]);
+        expect(wrapper.text()).toContain("random");
+    });
+
+    it("joins an unjoined available room via the API when clicked", async () => {
+        axiosMock.get.mockImplementation((url) => {
+            if (url === "/api/v1/rrc/hubs") {
+                return Promise.resolve({
+                    data: { hubs: [makeHub({ available_rooms: { random: null } })] },
+                });
+            }
+            if (url === "/api/v1/rrc/servers") {
+                return Promise.resolve({ data: { hubs: [makeHostedHub()] } });
+            }
+            if (url === "/api/v1/announces") {
+                return Promise.resolve({ data: { announces: [makeAnnounce()] } });
+            }
+            return Promise.resolve({ data: {} });
+        });
+        const wrapper = mountPage();
+        await vi.waitFor(() => expect(wrapper.vm.hubs.length).toBe(1));
+
+        await wrapper.vm.joinAvailableRoom(wrapper.vm.hubs[0], "random");
+
+        expect(axiosMock.post).toHaveBeenCalledWith(`/api/v1/rrc/hubs/${HUB_HASH}/rooms`, { room: "random" });
+    });
+
     it("loads messages and members when selecting a room", async () => {
         const wrapper = mountPage();
         await vi.waitFor(() => expect(wrapper.vm.hubs.length).toBe(1));
diff --git a/typings/jnius/__init__.pyi b/typings/jnius/__init__.pyi
new file mode 100644
index 00000000..f95df7b6
--- /dev/null
+++ b/typings/jnius/__init__.pyi
@@ -0,0 +1 @@
+# Optional Android dependency; stub for type checking only.