How to Use WhatsApp Business on Multiple Devices

Can you use one WhatsApp Business number on multiple devices?

Yes. WhatsApp's linked devices feature lets one account run on a primary phone plus up to four companion devices at the same time: WhatsApp Web, the desktop apps, a tablet, or other phones. You add each one by scanning a QR code with the phone that holds the number (About linked devices, WhatsApp Help Center).

This is the same mechanism whether you use the regular WhatsApp app or the WhatsApp Business app. It is also how a browser-based shared inbox such as whatsappx.si connects to a number: the inbox becomes one of the account's linked devices, exactly like WhatsApp Web.

How many devices can you link to WhatsApp Business?

The standard limit is four linked devices at a time per account, plus the primary phone. WhatsApp's help article puts it plainly: "You can stay connected by linking up to four devices at a time to your primary phone" (WhatsApp Help Center).

You may also see Meta advertise a larger number. The WhatsApp Business app features page mentions "linking up to 10 devices and agents", and the paid Meta Verified subscription lists a "Multi-agent account" for connecting multiple devices and assigning chats to sales agents (WhatsApp Business app features; Meta Verified for business). Meta describes these limits differently on different pages, so check what is offered in your market before you plan around a number above four.

How do you link a device with a QR code?

The steps are the same for WhatsApp Web, the desktop apps and a web-based inbox (How to link a device, WhatsApp Help Center):

1. Open the app or website you want to link. It shows a QR code.
2. On the primary phone, open WhatsApp or WhatsApp Business, go to Settings (or the menu on Android) and tap Linked devices.
3. Tap Link a device and unlock the phone if asked.
4. Point the phone's camera at the QR code on the screen. The new device then appears in your Linked devices list.

Since 2023 you can also link with your phone number and a one-time code instead of scanning, which is useful when the camera is not available (WhatsApp blog).

To remove a device, open Linked devices on the phone, tap the device and choose Log out.

Does WhatsApp Web work when your phone is off?

Yes, within limits. WhatsApp states that "linked devices work without your phone online, but will log out if your phone is unused for over 14 days" (WhatsApp Help Center). So you can close the phone, let its battery die or leave it at the office, and a linked laptop or inbox keeps sending and receiving.

Each linked device connects to WhatsApp independently and keeps end-to-end encryption, which is what makes this possible (WhatsApp blog).

Why do linked devices log out?

The most common reason is the 14-day rule: WhatsApp's how-to article says you must "log in to WhatsApp on your primary phone every 14 days to keep linked devices connected" (WhatsApp Help Center). If nobody opens WhatsApp on the phone for two weeks, every linked device is signed out and you have to scan again.

Other reasons you might get logged out:

• Someone removed the device from the Linked devices list on the phone.
• WhatsApp restricted the account. Its help article on unofficial apps notes that restrictions can include "the ability to link devices" (WhatsApp Help Center).

A simple habit for teams: keep the primary phone in the office, charged, and open WhatsApp on it at least once a week. For a shared inbox, treat the phone as infrastructure, not as one person's handset.

What doesn't work on linked devices?

Linked devices are companions, not replacements for the phone. WhatsApp lists these limits (WhatsApp Help Center):

Can multiple people use the same WhatsApp Business number?

Yes, in three ways, and the right one depends on how many people and how much structure you need.

1. Several phones on one account. WhatsApp said in April 2023 that "additional employees are now able to respond to customers directly from their phones under the same WhatsApp Business account" (WhatsApp blog). Each colleague's phone becomes a linked device. Up to four people can work this way. There is no assignment, no roles and no way to see who is handling a chat, so it suits very small teams.

2. A shared inbox linked as one device. Instead of each person scanning, a browser-based inbox scans once and becomes a single linked device. Everyone on the team signs in to the inbox with their own login. This is where whatsappx.si fits: the number is linked by QR code like WhatsApp Web, recent chat history syncs in, and the team gets one list of conversations with unread counts, assignment to a teammate, roles (owner, admin, agent) and live updates. One linked device slot is used, leaving the others free for the phone's owner and their laptop.

3. The official WhatsApp Business Platform. For teams that need many agents, approved message templates to reach customers outside the 24-hour customer service window, or automation at scale, Meta's Cloud API is the sanctioned route. It is not tied to a phone app, and business numbers can send "up to 80 messages per second by default" (Meta for Developers). Meta charges its own per-message fees on the platform (Meta pricing). whatsappx.si supports this too, through Meta Embedded Signup inside the app.

If you want to keep the Business app on the phone and add the API on the same number, Meta's coexistence option does that. Note that it fixes throughput at 20 messages per second and unlinks companion devices during setup, which you can then re-link (except WhatsApp for Windows and WearOS) (Meta for Developers).

Is it safe to link a business number to a third-party inbox?

No tool can guarantee that a number will never be restricted. WhatsApp's help pages and policies point to two things that get accounts into trouble:

• Unofficial apps. WhatsApp says that "linking your WhatsApp account to unofficial versions of WhatsApp violates our Terms of Service" and may lead to temporary or permanent bans. Its examples include modified clients such as GB WhatsApp and FM WhatsApp (WhatsApp Help Center). whatsappx.si connects through WhatsApp's linked-device feature, the same way WhatsApp Web does, rather than as a modified app. That does not exempt a number from WhatsApp's rules, so how you message still matters.
• Bulk or automated outbound messaging. WhatsApp's position is unambiguous: "Our products are not intended for bulk or automated messaging, both of which have always been a violation of our Terms of Service" (WhatsApp Help Center). The Business Messaging Policy adds that you may only contact people who gave you their number and opted in, and that WhatsApp may "limit or remove your access" for "messaging people at scale in an unauthorized manner" (WhatsApp Business Messaging Policy).

Practical number-safety rules, whichever tool you use:

1. Warm up new numbers. Use a brand-new WhatsApp number normally for 15–20 days before connecting it to any software.
2. Send in small batches. 5–10 messages at a time, then pause. Never paste a list and blast it.
3. Only message people who opted in, and stop when someone asks you to.
4. Reply, don't broadcast. A linked-device inbox is for conversations customers started or agreed to. If you need outbound reach at volume, use approved templates on the official platform.
5. Keep the phone active so the link does not drop after 14 days.

Where does whatsappx.si fit?

whatsappx.si is a shared inbox for teams. You connect the WhatsApp you already have by scanning a QR code, which makes the workspace one of your account's four linked devices, and your whole team replies from one inbox: owners and admins assign each chat to a teammate, agents see only their assigned chats, and everyone gets unread counts and live updates.

Keyword-triggered auto-replies are available today: when an incoming message contains a keyword you choose, the rule sends your reply, and you can switch each rule on or off. AI-written replies to customers are coming soon and are not available yet.

As additional options, you can add numbers through Meta's official WhatsApp Business Platform in the same workspace and sync message templates with Meta, and developers can use the REST API and webhooks.

It is not the right tool if you want to send campaigns to a list, and it does not change WhatsApp's rules: the 14-day phone rule, the four-device limit and the opt-in requirement all still apply. For a very small team, WhatsApp's own multi-phone linking or Meta Verified's multi-agent option may be all you need.

How do you get started?

Create a workspace, choose Connect WhatsApp, and scan the QR code with the phone that holds the number. Invite teammates by email, keep the phone charged and signed in, and reply to customers at a human pace.