Virtual number for WhatsApp: how it works, what it costs, and when to use one
By José Pedro · Co-founder of CRPRO
You can have WhatsApp with no physical SIM: a virtual number. In this guide you'll see how it works, what it costs, when it's worth it for businesses — and the mistakes that lead to a ban when the number is bought the wrong way.
Using a personal number to handle customers is the fastest way to mix your life and work — and to lose the history when someone leaves the team. The fastest-growing alternative is a virtual number for WhatsApp: a phone number that exists with no physical SIM, activated over the internet, that you connect to WhatsApp Business and use as the company's official channel. In this guide: how it works, what it costs, when it's worth it, and how to avoid getting banned.
What is a virtual number?
A virtual number (or VoIP number) is a phone line that works over the internet, with no SIM card — it can be a mobile number or even a landline number with a local area code. It receives calls and texts — including the WhatsApp verification code, which is what matters here. In practice, you sign up for the number with a virtual carrier, receive the activation code by text or call, and register WhatsApp with it, just as you would with a regular SIM.
The result is WhatsApp with no SIM card: the number lives in the cloud, can be used on any device, and doesn't depend on a physical phone dedicated to the company.
What businesses use a virtual WhatsApp number for
- Separating personal from professional — reason number 1. The salesperson handles support from the company's number, not their own.
- Keeping the number when the team changes — the line belongs to the company; if an employee leaves, the conversation and the relationship stay.
- Having a local area code in another city — virtual carriers sell numbers with the area code you choose; your company in São Paulo can serve Recife with an 81 area code.
- A dedicated channel for campaigns — one number exclusively for ads and another for post-sale, without mixing queues.
- A foundation for the official API — to connect a number to the official WhatsApp API, it only needs to receive the verification code once. A virtual number works perfectly for this — once connected, it doesn't even need to keep "existing" on a device.
How to get a virtual number for WhatsApp (step-by-step)
- Sign up for the number with a virtual telephony service that can receive a verification text/call. In Brazil, the most common options are VoIP carriers with a domestic area code; internationally, services like Google Voice (US) also work.
- Confirm the number accepts WhatsApp verification — ask before you pay. Some services block texts from apps.
- Download WhatsApp Business and register the new number. Choose to receive the code by call if the text doesn't arrive.
- Complete the business profile: company name, business hours, catalog, and an automatic greeting message.
- Announce the new number with a wa.me link and a QR Code — so nobody types the wrong number.
How much does it cost?
| Option | Price range | Who it's for |
|---|---|---|
| Dedicated prepaid SIM | ~R$ 10–20/month | A quick fix; requires a device or dual-SIM |
| Domestic virtual number (VoIP) | ~R$ 20–60/month | Companies that want a local area code and a company line |
| Number via the official API | included with the provider | Operations with a team, automation, and scale |
The physical SIM looks cheaper, but it carries a hidden cost: it's tied to a device, disappears when the phone breaks, and doesn't scale for a team.
How to avoid getting banned
WhatsApp doesn't ban virtual numbers — but the wrong use brings down any number, virtual or physical:
- Never buy a number "pre-activated with WhatsApp already set up." Recycled numbers or ones activated in SIM farms are already flagged and get banned within days. Activate it yourself, on your own device.
- Warm up the number: for the first few days, have normal conversations with contacts who reply. Sending a bulk message on day 1 is the classic spam pattern — read about what gets numbers banned in bulk sending.
- Avoid unofficial apps (GB WhatsApp and clones): a ban is almost guaranteed.
- For volume, use the official API: it's the only path where sending at scale is allowed by WhatsApp itself, with approved templates — see how the official API works.
Virtual number + CRM: the combo that separates amateurs from a real operation
Having the company's number is half the problem. The other half is what happens inside it: if three salespeople reply from the same number on a single phone, the queue turns into chaos all the same.
That's where multi-agent support comes in: the virtual number (or one via the official API) connects to a CRM like CRPRO, and the whole team handles support from the same number, with every conversation having an owner, a pipeline, and a history. In our benchmark with real companies, 20% of contacts arrive outside business hours — with support AI replying in seconds, not even those get lost.
Next steps:
- Generate the wa.me link for your new number
- Learn about WhatsApp's official API to operate with a team
- Try CRPRO free and connect your number in minutes
Frequently Asked Questions
Does a virtual number work with regular WhatsApp and Business? Yes, on both. For a business, always use Business (or the official API): a business profile, catalog, and automatic messages.
Can WhatsApp ban a virtual number? Bans aren't based on the type of number, but on behavior: spam, cold lists, modified apps. A well-used virtual number lasts as long as any other.
Can I use the same virtual number on multiple devices? Yes — WhatsApp allows linked devices, and with a multi-agent CRM the whole team handles support from the same number, each logged into their own account.
Does a virtual number work for the official WhatsApp API? It does, and it's one of the most common combinations: the number only needs to receive the verification once. After that, it lives in Meta's cloud.
Which area code should I choose? The one for the area where your customers are. A local number builds more trust and raises the reply rate.