diff --git a/backend/app/Services/GeminiService.php b/backend/app/Services/GeminiService.php
index 91e1d0e..0438219 100644
--- a/backend/app/Services/GeminiService.php
+++ b/backend/app/Services/GeminiService.php
@@ -218,7 +218,7 @@ class GeminiService
      */
     public static function generateAudioResponse(string $apiKey, string $systemPrompt, string $userMessage, string $voiceName = 'Puck'): ?array
     {
-        $url = 'https://generativelanguage.googleapis.com/v1beta/models/gemini-flash-lite-latest:generateContent?key=' . $apiKey;
+        $url = 'https://generativelanguage.googleapis.com/v1beta/models/gemini-2.0-flash:generateContent?key=' . $apiKey;
 
         $payload = json_encode([
             'contents' => [
@@ -280,7 +280,7 @@ class GeminiService
      */
     public static function generateAudioResponseFromAudio(string $apiKey, string $systemPrompt, string $audioBase64, string $mimeType, string $voiceName = 'Puck'): ?array
     {
-        $url = 'https://generativelanguage.googleapis.com/v1beta/models/gemini-flash-lite-latest:generateContent?key=' . $apiKey;
+        $url = 'https://generativelanguage.googleapis.com/v1beta/models/gemini-2.0-flash:generateContent?key=' . $apiKey;
 
         if (strpos($mimeType, ';') !== false) {
             $mimeType = trim(explode(';', $mimeType)[0]);
diff --git a/backend/public/test_audio.php b/backend/public/test_audio.php
index f6f5b89..28d180e 100644
--- a/backend/public/test_audio.php
+++ b/backend/public/test_audio.php
@@ -38,32 +38,77 @@ echo "\n--- Testing Gemini Audio Response ---\n";
 $systemPrompt = "You are a friendly customer service assistant. Speak in a warm, welcoming tone.";
 $testMsg = "مرحبا، هل متجركم مفتوح اليوم؟";
 
-echo "Sending text prompt: '$testMsg'\n";
-$startTime = microtime(true);
-$audioResponse = GeminiService::generateAudioResponse($apiKey, $systemPrompt, $testMsg, 'Puck');
-$elapsedTime = round(microtime(true) - $startTime, 2);
+    // Test via cURL directly to dump exact error
+    $url = 'https://generativelanguage.googleapis.com/v1beta/models/gemini-2.0-flash:generateContent?key=' . $apiKey;
+    $payload = json_encode([
+        'contents' => [[
+            'role' => 'user',
+            'parts' => [['text' => $testMsg]]
+        ]],
+        'systemInstruction' => [
+            'parts' => [['text' => $systemPrompt]]
+        ],
+        'generationConfig' => [
+            'responseModalities' => ['AUDIO'],
+            'speechConfig' => [
+                'voiceConfig' => [
+                    'prebuiltVoiceConfig' => [
+                        'voiceName' => 'Puck'
+                    ]
+                ]
+            ]
+        ]
+    ]);
 
-if ($audioResponse && !empty($audioResponse['audio'])) {
-    echo "✅ [Gemini] Successfully generated voice note in {$elapsedTime} seconds!\n";
-    echo "ℹ️ [Gemini] Audio MimeType: " . $audioResponse['mimeType'] . "\n";
-    echo "ℹ️ [Gemini] Audio Size: " . strlen($audioResponse['audio']) . " base64 chars\n";
-    
-    // 3. Test Audio-to-Audio conversion
-    echo "\n--- Testing Audio-to-Audio (Speech-to-Speech) ---\n";
-    $startTime = microtime(true);
-    $audioResponse2 = GeminiService::generateAudioResponseFromAudio($apiKey, $systemPrompt, $audioResponse['audio'], $audioResponse['mimeType'], 'Puck');
-    $elapsedTime2 = round(microtime(true) - $startTime, 2);
-    
-    if ($audioResponse2 && !empty($audioResponse2['audio'])) {
-        echo "✅ [Gemini] Successfully generated Audio-to-Audio response in {$elapsedTime2} seconds!\n";
-        echo "ℹ️ [Gemini] Audio MimeType: " . $audioResponse2['mimeType'] . "\n";
-        echo "ℹ️ [Gemini] Audio Size: " . strlen($audioResponse2['audio']) . " base64 chars\n";
+    $ch = curl_init($url);
+    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+    curl_setopt($ch, CURLOPT_POST, true);
+    curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);
+    curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
+    curl_setopt($ch, CURLOPT_TIMEOUT, 30);
+    $response = curl_exec($ch);
+    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+    curl_close($ch);
+
+    if ($httpCode !== 200) {
+        echo "❌ [Gemini API Error] HTTP Status: " . $httpCode . "\n";
+        echo "Response Payload: " . $response . "\n";
+        $audioResponse = null;
     } else {
-        echo "❌ [Gemini] Audio-to-Audio generation failed. Check errors below:\n";
+        $data = json_decode($response, true);
+        $part = $data['candidates'][0]['content']['parts'][0] ?? null;
+        if ($part && isset($part['inlineData'])) {
+            $audioResponse = [
+                'audio' => $part['inlineData']['data'],
+                'mimeType' => $part['inlineData']['mimeType'] ?? 'audio/mp4'
+            ];
+        } else {
+            echo "❌ [Gemini API Error] Response did not contain inlineData. Response: " . $response . "\n";
+            $audioResponse = null;
+        }
+    }
+
+    if ($audioResponse && !empty($audioResponse['audio'])) {
+        echo "✅ [Gemini] Successfully generated voice note!\n";
+        echo "ℹ️ [Gemini] Audio MimeType: " . $audioResponse['mimeType'] . "\n";
+        echo "ℹ️ [Gemini] Audio Size: " . strlen($audioResponse['audio']) . " base64 chars\n";
+        
+        // 3. Test Audio-to-Audio conversion
+        echo "\n--- Testing Audio-to-Audio (Speech-to-Speech) ---\n";
+        $startTime = microtime(true);
+        $audioResponse2 = GeminiService::generateAudioResponseFromAudio($apiKey, $systemPrompt, $audioResponse['audio'], $audioResponse['mimeType'], 'Puck');
+        $elapsedTime2 = round(microtime(true) - $startTime, 2);
+        
+        if ($audioResponse2 && !empty($audioResponse2['audio'])) {
+            echo "✅ [Gemini] Successfully generated Audio-to-Audio response in {$elapsedTime2} seconds!\n";
+            echo "ℹ️ [Gemini] Audio MimeType: " . $audioResponse2['mimeType'] . "\n";
+            echo "ℹ️ [Gemini] Audio Size: " . strlen($audioResponse2['audio']) . " base64 chars\n";
+        } else {
+            echo "❌ [Gemini] Audio-to-Audio generation failed.\n";
+        }
+    } else {
+        echo "❌ [Gemini] Audio response generation failed.\n";
     }
-} else {
-    echo "❌ [Gemini] Audio response generation failed. Please check the logs.\n";
-}
 
 // 4. Check Node.js WhatsApp Gateway Status
 echo "\n--- Checking Node.js Gateway Status ---\n";