diff --git a/app/modules_app/voice/transcribe.php b/app/modules_app/voice/transcribe.php
index 0522e22..92a8145 100644
--- a/app/modules_app/voice/transcribe.php
+++ b/app/modules_app/voice/transcribe.php
@@ -98,7 +98,7 @@ function detectAudioMimeType(string $path, string $fallback, string $fileName =
 
 function extractIntentFromAudio(string $base64Audio, string $mimeType, string $apiKey): array
 {
-    $model = env('GEMINI_VOICE_MODEL', env('GEMINI_MODEL', 'gemini-2.5-flash'));
+    $model = env('GEMINI_VOICE_MODEL', 'gemini-2.5-flash');
 
     $systemPrompt = <<<PROMPT
 أنت مساعد أوامر صوتية عربي لمنصة "مُصادَق" للفوترة الأردنية.
@@ -159,28 +159,35 @@ PROMPT;
         ],
     ];
 
-    $url = "https://generativelanguage.googleapis.com/v1beta/models/{$model}:generateContent?key={$apiKey}";
+    $result = callGeminiGenerateContent($model, $payload, $apiKey);
 
-    $ch = curl_init($url);
-    curl_setopt_array($ch, [
-        CURLOPT_POST => true,
-        CURLOPT_POSTFIELDS => json_encode($payload, JSON_UNESCAPED_UNICODE),
-        CURLOPT_RETURNTRANSFER => true,
-        CURLOPT_HTTPHEADER => ['Content-Type: application/json'],
-        CURLOPT_TIMEOUT => 45,
-    ]);
-
-    $response = curl_exec($ch);
-    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
-    $error = curl_error($ch);
-    curl_close($ch);
-
-    if ($httpCode !== 200 || !$response) {
-        error_log("Voice Gemini Error: HTTP {$httpCode} | {$error} | {$response}");
-        json_error('فشل تحليل الصوت بواسطة Gemini', 500);
+    // Some Gemini model/API combinations reject JSON mode for multimodal audio.
+    // Retry once with prompt-only JSON enforcement before failing the request.
+    if ($result['http_code'] !== 200 || !$result['body']) {
+        $fallbackPayload = $payload;
+        unset($fallbackPayload['generationConfig']['responseMimeType']);
+        $result = callGeminiGenerateContent($model, $fallbackPayload, $apiKey);
     }
 
-    $respData = json_decode($response, true);
+    if ($result['http_code'] !== 200 || !$result['body']) {
+        $geminiError = parseGeminiError($result['body']);
+        error_log(
+            "Voice Gemini Error: HTTP {$result['http_code']} | {$result['curl_error']} | {$result['body']}"
+        );
+
+        json_error(
+            'فشل تحليل الصوت بواسطة Gemini: ' . $geminiError['message'],
+            502,
+            [
+                'gemini_http_code' => $result['http_code'],
+                'gemini_status' => $geminiError['status'],
+                'gemini_model' => $model,
+                'audio_mime_type' => $mimeType,
+            ]
+        );
+    }
+
+    $respData = json_decode($result['body'], true);
     if (!is_array($respData)) {
         json_error('تعذر قراءة رد Gemini', 500);
     }
@@ -217,6 +224,52 @@ PROMPT;
     ];
 }
 
+function callGeminiGenerateContent(string $model, array $payload, string $apiKey): array
+{
+    $url = "https://generativelanguage.googleapis.com/v1beta/models/{$model}:generateContent";
+
+    $ch = curl_init($url);
+    curl_setopt_array($ch, [
+        CURLOPT_POST => true,
+        CURLOPT_POSTFIELDS => json_encode($payload, JSON_UNESCAPED_UNICODE),
+        CURLOPT_RETURNTRANSFER => true,
+        CURLOPT_HTTPHEADER => [
+            'Content-Type: application/json',
+            'x-goog-api-key: ' . $apiKey,
+        ],
+        CURLOPT_TIMEOUT => 45,
+    ]);
+
+    $response = curl_exec($ch);
+    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+    $error = curl_error($ch);
+    curl_close($ch);
+
+    return [
+        'body' => is_string($response) ? $response : '',
+        'http_code' => (int)$httpCode,
+        'curl_error' => $error ?: '',
+    ];
+}
+
+function parseGeminiError(string $response): array
+{
+    $decoded = json_decode($response, true);
+    $error = is_array($decoded) ? ($decoded['error'] ?? null) : null;
+
+    if (is_array($error)) {
+        return [
+            'message' => (string)($error['message'] ?? 'رد غير معروف من Gemini'),
+            'status' => (string)($error['status'] ?? ''),
+        ];
+    }
+
+    return [
+        'message' => 'رد غير معروف من Gemini',
+        'status' => '',
+    ];
+}
+
 function decodeModelJson(string $rawText): ?array
 {
     $text = trim($rawText);