> For the complete documentation index, see [llms.txt](https://docs.mercuri.cx/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mercuri.cx/mercuri-docs-pt/canal-de-comunicacao/integracao-com-o-whatsapp/onboarding-with-existing-whatsapp-business-app-account-and-phone-number.md).

# Onboarding with Existing WhatsApp Business App Account & Phone Number

Many businesses already use the **WhatsApp Business App** to communicate with their customers. Now, it's possible to **onboard using the existing WhatsApp Business account and phone number**.

**What This Flow Lets You Do:**

* Use the **same number** you're already using on the WhatsApp Business App.
* Send messages at scale.
* Still reply 1:1 via your WhatsApp Business App.
* Keep your **chat history synced** across both platforms.

### Steps To Onboard

**Step 1: Choose your existing number**

When starting the onboarding process, you'll be asked whether you want to use an existing WhatsApp Business App number or a new one.\
\-  Select the **existing number** option.

**Step 2: Scan the QR code**

After selecting your number, WhatsApp (Meta) will **send a QR code** to your Business App.\
Just scan this code from your WhatsApp Business App and you're verified!

Once this is done, bulk messages can be sent via API and respond personally on the app, with all conversations staying in sync.

***

{% hint style="info" %}

#### ⚠️ Not Supported in These Countries

Currently, this flow **won’t work** if your WhatsApp Business number has a country code from:

* **Australia, Japan, Nigeria, Philippines, Russia, South Korea, South Africa, Turkey**
* Any country in the **European Union (EU)**, **European Economic Area (EEA)**, or the **United Kingdom (UK)**
  {% endhint %}