---
page_type: error
code: 37009
message: "37009: WhatsApp Voice: Voice application not configured"
level: ERROR
product: Programmable Voice
---

## Description

The user-initiated WhatsApp call failed because no voice application (TwiML application) is configured on the WhatsApp Sender.

### Possible Causes

Your WhatsApp Sender does not have a voice application configured.

### Possible Solutions

Please configure a voice application on the WhatsApp Sender either in Console or using Twilio API. For more details, please refer to [Configure your sender for WhatsApp Business Calling](/docs/voice/whatsapp-business-calling#configure-your-sender-for-whatsapp-business-calling).