diff --git a/agents/my_basic_agent_1_2_9.py b/agents/my_basic_agent_1_2_9.py
index f81ea89..0c6097a 100644
--- a/agents/my_basic_agent_1_2_9.py
+++ b/agents/my_basic_agent_1_2_9.py
@@ -1016,6 +1016,9 @@ async def entrypoint(ctx: JobContext, avatar_dispatcher_url: str = None, vision_
 
      # disable input audio at the start
     session.input.set_audio_enabled(False)
+    
+    # Track current audio state for mode switching
+    _audio_enabled_state = False
 
     @ctx.room.local_participant.register_rpc_method("start_turn")
     async def start_turn(data: rtc.RpcInvocationData):
@@ -1053,6 +1056,16 @@ async def entrypoint(ctx: JobContext, avatar_dispatcher_url: str = None, vision_
         session.clear_user_turn()
         logger.info("cancel turn")
 
+    @ctx.room.local_participant.register_rpc_method("switch_ptt_and_rt")
+    async def switch_ptt_and_rt(data: rtc.RpcInvocationData):
+        nonlocal _audio_enabled_state
+        # Toggle audio input state
+        _audio_enabled_state = not _audio_enabled_state
+        session.input.set_audio_enabled(_audio_enabled_state)
+        mode = "push-to-talk" if not _audio_enabled_state else "realtime"
+        logger.info(f"Switched to {mode} mode (audio enabled: {_audio_enabled_state})")
+        return json.dumps({"success": True, "mode": mode, "audio_enabled": _audio_enabled_state})
+
 if __name__ == "__main__":
     parser = argparse.ArgumentParser()
     parser.add_argument("--avatar-url", type=str, default=None, help="Avatar dispatcher URL")
diff --git a/src/components/playground/PhoneSimulator.tsx b/src/components/playground/PhoneSimulator.tsx
index 68e51e8..8eb9f03 100644
--- a/src/components/playground/PhoneSimulator.tsx
+++ b/src/components/playground/PhoneSimulator.tsx
@@ -65,6 +65,7 @@ export function PhoneSimulator({
   const lastPhoneMode = useRef(phoneMode);
   const [isPushToTalkActive, setIsPushToTalkActive] = useState(false);
   const [interruptRejected, setInterruptRejected] = useState(false);
+  const [isPushToTalkMode, setIsPushToTalkMode] = useState(true); // false = realtime mode, true = PTT mode (default)
   const pushToTalkButtonRef = useRef<HTMLButtonElement>(null);
 
   useEffect(() => {
@@ -428,6 +429,23 @@ export function PhoneSimulator({
     setShowVoiceMenu(!showVoiceMenu);
   };
 
+  const handleModeSwitch = async () => {
+    if (!room || !voiceAssistant.agent) return;
+    
+    try {
+      await room.localParticipant.performRpc({
+        destinationIdentity: voiceAssistant.agent.identity,
+        method: "switch_ptt_and_rt",
+        payload: "",
+      });
+      // Toggle mode on success
+      setIsPushToTalkMode(prev => !prev);
+    } catch (error: any) {
+      console.error("Failed to switch mode:", error);
+      // Don't show error toast for mode switch failures, just log
+    }
+  };
+
   // Check if agent supports push-to-talk (optional check, button will show regardless)
   const supportsPushToTalk = useMemo(() => {
     if (!voiceAssistant.agent || !agentAttributes.attributes) return false;
@@ -513,6 +531,9 @@ export function PhoneSimulator({
   };
 
   const handlePushToTalkEnd = useCallback(async () => {
+    // Always clear interrupt rejection state when button is released
+    setInterruptRejected(false);
+    
     if (!room || !voiceAssistant.agent || !isPushToTalkActive) return;
     
     try {
@@ -522,16 +543,17 @@ export function PhoneSimulator({
         payload: "",
       });
       setIsPushToTalkActive(false);
-      setInterruptRejected(false);
     } catch (error: any) {
       console.error("Failed to end turn:", error);
       // Don't show error toast on end_turn failure as it might be called during cleanup
       setIsPushToTalkActive(false);
-      setInterruptRejected(false);
     }
   }, [room, voiceAssistant.agent, isPushToTalkActive]);
 
   const handlePushToTalkCancel = useCallback(async () => {
+    // Always clear interrupt rejection state when button is cancelled
+    setInterruptRejected(false);
+    
     if (!room || !voiceAssistant.agent || !isPushToTalkActive) return;
     
     try {
@@ -541,11 +563,9 @@ export function PhoneSimulator({
         payload: "",
       });
       setIsPushToTalkActive(false);
-      setInterruptRejected(false);
     } catch (error) {
       console.error("Failed to cancel turn:", error);
       setIsPushToTalkActive(false);
-      setInterruptRejected(false);
     }
   }, [room, voiceAssistant.agent, isPushToTalkActive]);
 
@@ -587,10 +607,14 @@ export function PhoneSimulator({
 
     // Handle global mouseup/touchend to end push-to-talk even if released outside button
     const handleGlobalMouseUp = () => {
+      // Clear interrupt rejection state immediately when button is released
+      setInterruptRejected(false);
       handlePushToTalkEnd();
     };
 
     const handleGlobalTouchEnd = () => {
+      // Clear interrupt rejection state immediately when button is released
+      setInterruptRejected(false);
       handlePushToTalkEnd();
     };
 
@@ -1011,56 +1035,127 @@ export function PhoneSimulator({
           ) : (
             <div className="absolute bottom-[5%] left-0 w-full px-[8%] z-40">
             <div className="w-full flex flex-col items-center justify-center gap-4">
-              {/* Push-to-Talk Button - Centered and Bigger */}
+              {/* Mode Toggle Switch */}
               {phoneMode !== "important_message" && phoneMode !== "hand_off" && voiceAssistant.agent && (
-                <button
-                  ref={pushToTalkButtonRef}
-                  className={`w-24 h-24 rounded-full backdrop-blur-md transition-all flex flex-col items-center justify-center gap-2 ${
-                    interruptRejected
-                      ? "bg-red-500/70 text-white"
-                      : isPushToTalkActive
-                      ? "bg-green-500 text-white scale-110 shadow-lg shadow-green-500/50"
-                      : "bg-blue-500/70 text-white hover:bg-blue-500/90"
-                  }`}
-                  onMouseDown={handlePushToTalkMouseDown}
-                  onMouseUp={handlePushToTalkMouseUp}
-                  onTouchStart={handlePushToTalkTouchStart}
-                  onTouchEnd={handlePushToTalkTouchEnd}
-                  title={supportsPushToTalk ? "Push to Talk" : "Push to Talk (may not be supported by this agent)"}
-                >
-                  <MicIcon className="w-8 h-8" />
-                  <span className="text-xs font-medium">
-                    {interruptRejected ? "不允许打断" : "按住说话"}
+                <div className="flex items-center gap-3 mb-2">
+                  <span className={`text-xs font-medium transition-colors ${isPushToTalkMode ? "text-white" : "text-gray-400"}`}>
+                    按下说话模式
                   </span>
-                </button>
+                  <button
+                    onClick={handleModeSwitch}
+                    className={`relative inline-flex h-6 w-11 items-center rounded-full transition-colors focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2 ${
+                      !isPushToTalkMode ? "bg-blue-500" : "bg-gray-600"
+                    }`}
+                    role="switch"
+                    aria-checked={!isPushToTalkMode}
+                    title={isPushToTalkMode ? "切换到实时对话模式" : "切换到按下说话模式"}
+                  >
+                    <span
+                      className={`inline-block h-4 w-4 transform rounded-full bg-white transition-transform ${
+                        !isPushToTalkMode ? "translate-x-6" : "translate-x-1"
+                      }`}
+                    />
+                  </button>
+                  <span className={`text-xs font-medium transition-colors ${!isPushToTalkMode ? "text-white" : "text-gray-400"}`}>
+                    实时对话模式
+                  </span>
+                </div>
               )}
 
-              {/* Other Controls */}
-              <div className="w-full flex items-center justify-center gap-8">
-                {phoneMode !== "important_message" && phoneMode !== "hand_off" && (
-                  <button
-                    className={`p-4 rounded-full backdrop-blur-md transition-colors ${
-                      !isMicEnabled
-                        ? "bg-white text-black"
-                        : "bg-gray-600/50 text-white hover:bg-gray-600/70"
-                    }`}
-                    onClick={handleMicToggle}
-                  >
-                    {isMicEnabled ? (
-                      <MicIcon className="w-6 h-6" />
-                    ) : (
-                      <MicOffIcon className="w-6 h-6" />
+              {/* Push-to-Talk Mode Layout */}
+              {isPushToTalkMode && phoneMode !== "important_message" && phoneMode !== "hand_off" && voiceAssistant.agent && (
+                <div className="w-full flex items-center justify-center gap-8">
+                  {/* Camera Switch Button - Left */}
+                  <div className="relative">
+                    <button
+                      className="p-4 rounded-full bg-gray-800/50 text-white hover:bg-gray-800/70 transition-colors"
+                      onClick={handleSwitchCamera}
+                    >
+                      <SwitchCameraIcon className="w-6 h-6" />
+                    </button>
+                    {showCameraMenu && (
+                      <div className="absolute bottom-full mb-2 left-0 bg-gray-900 border border-gray-800 rounded-lg shadow-xl py-2 w-48 z-50">
+                        {cameras.length === 0 ? (
+                          <div className="px-4 py-2 text-gray-500 text-sm">
+                            No cameras found
+                          </div>
+                        ) : (
+                          cameras.map((device) => (
+                            <button
+                              key={device.deviceId}
+                              onClick={() => handleSelectCamera(device.deviceId)}
+                              className="w-full text-left px-4 py-2 text-sm text-white hover:bg-gray-800 transition-colors truncate"
+                            >
+                              {device.label ||
+                                `Camera ${cameras.indexOf(device) + 1}`}
+                            </button>
+                          ))
+                        )}
+                      </div>
                     )}
-                  </button>
-                )}
+                  </div>
 
-                <button
-                  className="p-4 rounded-full bg-red-500 text-white hover:bg-red-600 transition-colors"
-                  onClick={handleDisconnect}
-                >
-                  <PhoneOffIcon className="w-6 h-6" />
-                </button>
-              </div>
+                  {/* Large Push-to-Talk Button - Center */}
+                  <button
+                    ref={pushToTalkButtonRef}
+                    className={`w-24 h-24 rounded-full backdrop-blur-md transition-all flex flex-col items-center justify-center gap-2 ${
+                      interruptRejected
+                        ? "bg-red-500/70 text-white"
+                        : isPushToTalkActive
+                        ? "bg-green-500 text-white scale-110 shadow-lg shadow-green-500/50"
+                        : "bg-blue-500/70 text-white hover:bg-blue-500/90"
+                    }`}
+                    onMouseDown={handlePushToTalkMouseDown}
+                    onMouseUp={handlePushToTalkMouseUp}
+                    onTouchStart={handlePushToTalkTouchStart}
+                    onTouchEnd={handlePushToTalkTouchEnd}
+                    title={supportsPushToTalk ? "Push to Talk" : "Push to Talk (may not be supported by this agent)"}
+                  >
+                    <MicIcon className="w-8 h-8" />
+                    <span className="text-xs font-medium">
+                      {interruptRejected ? "不允许打断" : "按住说话"}
+                    </span>
+                  </button>
+
+                  {/* End Call Button - Right */}
+                  <button
+                    className="p-4 rounded-full bg-red-500 text-white hover:bg-red-600 transition-colors"
+                    onClick={handleDisconnect}
+                  >
+                    <PhoneOffIcon className="w-6 h-6" />
+                  </button>
+                </div>
+              )}
+
+              {/* Realtime Mode Layout */}
+              {!isPushToTalkMode && (
+                <div className="w-full flex items-center justify-center gap-8">
+                  {phoneMode !== "important_message" && phoneMode !== "hand_off" && (
+                    <button
+                      className={`p-4 rounded-full backdrop-blur-md transition-colors ${
+                        !isMicEnabled
+                          ? "bg-white text-black"
+                          : "bg-gray-600/50 text-white hover:bg-gray-600/70"
+                      }`}
+                      onClick={handleMicToggle}
+                    >
+                      {isMicEnabled ? (
+                        <MicIcon className="w-6 h-6" />
+                      ) : (
+                        <MicOffIcon className="w-6 h-6" />
+                      )}
+                    </button>
+                  )}
+
+                  {/* End Call Button */}
+                  <button
+                    className="p-4 rounded-full bg-red-500 text-white hover:bg-red-600 transition-colors"
+                    onClick={handleDisconnect}
+                  >
+                    <PhoneOffIcon className="w-6 h-6" />
+                  </button>
+                </div>
+              )}
             </div>
             </div>
           )