# How to link a device to WhatsApp Business with a QR code

By HeyMark · Updated November 6, 2026

You want to handle business chats on your computer and already use WhatsApp Business on your phone. You can link Web or desktop by scanning the QR code on the computer you intend to use. Keep your primary phone nearby: you will use it to authorize the session and check which device connected.

## Prepare your phone and computer

Use your primary phone with access to WhatsApp Business and a computer you control. Open [WhatsApp Web](https://web.whatsapp.com/) in the browser, or open the official desktop application obtained from [WhatsApp](https://www.whatsapp.com/download). Keep the linking QR code visible.

The [WhatsApp Business help](https://faq.whatsapp.com/878854700132604/?cms_platform=android&locale=en_US) documents up to **four linked devices at once**. Your primary phone does not need to stay connected continuously, but you must log in to it every **14 days** to keep linked devices connected.

The same help mentions up to ten devices with a Meta Verified subscription. If you need that extension, check availability and the conditions offered to your account before relying on it.

## Scan the QR code from WhatsApp Business

1. Open **WhatsApp Business** on your primary Android phone.
2. Tap **More options**, the three-dot menu, then **Linked devices**.
3. Tap **Link a device**. If asked to unlock your phone, complete the check on your own device.
4. Point your phone at the QR code displayed on the computer you want to link.
5. Wait for the computer to open the session.

If your primary phone is an iPhone, the documented route is **Settings → Linked Devices → Link a Device**. The additional device displays the QR code and the primary phone scans it.

## Check the session you authorized

Return to **Linked devices** on your phone and check that the computer you just connected appears. Also check that the session open in Web or desktop belongs to your business account.

Only scan a linking QR code you opened yourself on the intended computer. WhatsApp’s [linked-device help](https://faq.whatsapp.com/378279804439436/?cms_platform=android&locale=en_US) recommends official apps and websites. Do not authorize a login QR code someone sends you in a chat or asks you to scan for a supposed verification.

## Close a session you no longer need

On your primary phone, open **Linked devices**, select the device and tap **Log out**. This is the [official unlinking flow](https://faq.whatsapp.com/834124628020911/?cms_platform=android&locale=en_US). Then check that the computer no longer has access to your chats.

If you have reached the device limit and want to add another computer, review existing sessions and close only one you no longer need. If you see a session you do not recognize, select it and log it out.

## If the session opens but messages are missing

Linking the computer again does not guarantee your entire history will appear. Keep your primary phone available to consult your conversations and use the guide to [older messages missing from WhatsApp Web](https://heymark.ai/en/solutions/whatsapp-web-missing-old-messages/). Checking history is a separate task from authorizing a new device.

## Frequently asked questions

### Must my primary phone stay connected?

Not continuously. WhatsApp says you need to log in to your primary phone every 14 days to keep linked devices connected.

### How many devices can I link?

WhatsApp Business help documents up to four linked devices at once. It also mentions up to ten with a Meta Verified subscription; check availability and conditions for your account.

### Will linking again restore every old message?

Linking provides access from another device; it does not guarantee recovery of your entire history. If messages are missing on Web, check your primary phone’s history and the specific troubleshooting guide.

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- [HeyMark MCP documentation](https://heymark.ai/en/mcp/)
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- [Full site content for language models](https://heymark.ai/llms-full.txt)
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- OAuth protected-resource metadata: [/.well-known/oauth-protected-resource](https://mcp.heymark.ai/.well-known/oauth-protected-resource)
- MCP server card: [/server-card](https://mcp.heymark.ai/server-card)