---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/37003#article
headline: "37003: WhatsApp Voice: Duplicated call"
url: https://www.twilio.com/docs/api/errors/37003
inLanguage: en
dateModified: 2026-03-11T20:01:16.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 37003: WhatsApp Voice: Duplicated call

Log Type: APPLICATION

Log Level: ERROR

## Description

The business-initiated WhatsApp call failed because there is an ongoing call from the business number to the same consumer number.

### Possible causes

A call is already ongoing with the receiver.

### Possible solutions

Try again later when the ongoing call ends.