The company has had the same phone number for twelve years, printed on its storefront, vehicle, business card, and advertisement. But WhatsApp is on a cell phone bought last year, with a number no one remembers. All the contact memory accumulated over a decade points to a line that does not receive messages — and the customer who tries to call there simply is not answered.
In this article
- Yes, you can use a landline
- Why this matters more than it seems
- Step-by-step verification
- The value of recovering the known number
- When to keep more than one number
- What if the number is already with an employee?
- How to promote the number so it gets used
- What happens with calls
- One number, two behaviors
- The business profile the number needs
- Frequently asked questions
Yes, you can use a landline
Many companies don’t know this, but WhatsApp allows registering a landline number. The difference is only in verification: instead of an SMS code, you choose the option to receive confirmation by call, and the code is read aloud to whoever answers the phone.
It’s a simple process with three practical conditions:
- Someone must be available to answer the call at the exact moment of verification.
- The line must receive direct external calls. Extensions behind IVR menus usually interfere — ideally, it’s a direct number.
- The number cannot be registered on another WhatsApp account.
Once done, the landline works like any other number: it receives messages, media, and when connected via official API, it integrates into the platform along with the others.
Why this matters more than it seems
- Leverages contact memory. All printed material, signage, vehicles, and old ads start directing messages to the right place.
- Conveys permanence. A landline with local area code signals an established company, especially in service and in sales to other businesses.
- Protects the database. The number belongs to the company, not to an employee’s device — the root of the problem described in when the salesperson leaves the company.
- Unifies channels. Callers and messengers reach the same number, simplifying promotion and tracking.
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Step-by-step verification
- Choose the right number: a direct line, without a menu, that someone can answer at the scheduled time.
- Ensure it’s not in use on another WhatsApp account. If it is, you must close the previous registration first.
- Start registration in the app providing the number with area code, in landline format.
- Request verification by call. This option appears after SMS verification fails or expires — usually after a short wait.
- Answer and write down the code read aloud. Have paper ready; the call is short and does not repeat indefinitely.
- Complete registration and immediately configure the business profile’s name, description, hours, and address.
If the intention is to operate with a team, the next step is to connect this number to the platform — via QR or official API, depending on volume and sending needs, compared in app vs API.
Be careful on verification day: if the number is already used for customer calls, notify reception beforehand. It’s common for the automated call to be hung up by whoever answers, thinking it’s telemarketing — and each failed attempt requires waiting before trying again.
The value of recovering the known number
Service company with 11 years in the market, landline number promoted in all historical communication.
Messages arriving at a number without WhatsApp
The number was already promoted, customers were already trying to use it, and the company simply wasn’t on the other end. This is probably the highest return correction per hour of work in the entire service structure.
When to keep more than one number
Not every operation should concentrate everything on one line. Three situations justify separate numbers:
- Sales and support with distinct teams, where mixing queues hinders prioritization.
- Broadcasting and conversation separated. Keeping the relationship number separate from the volume sending number protects the main one — the logic explained in how to warm up a new number.
- Branches or subsidiaries with their own local support.
What doesn’t make sense is a number per salesperson. It fragments the database, prevents lead distribution, and creates exactly the dependency the company should avoid. Multiple agents fit on the same number when there is a platform, without anyone needing to share a device.
What if the number is already with an employee?
Common situation: the company’s commercial WhatsApp is registered on a line that, in the operator’s contract, belongs to an individual. Three steps:
- Transfer the line ownership to the company’s CNPJ with the operator. Without this, the company does not control its own channel.
- Migrate the WhatsApp registration to the platform, so the history no longer lives only on the device.
- Notify active customers before any number change, if applicable.
Changing the number is the last resort, and it’s costly: printed material, ads, Google profile, supplier records, and especially customer memory. When unavoidable, keep the old number active for at least 90 days with an automatic message indicating the new one.
How to promote the number so it gets used
Having the right number is not enough; the customer needs to find it when deciding to contact the company. The most conversation-generating points:
- Google profile, where most local searches end. A message button there usually yields more than the entire website.
- Website with floating button on all pages, not just the contact page — the customer decides to chat at any point during browsing.
- Email signature, invoice, and receipt, places people check when they need support.
- Storefront, vehicle, and printed material, with the WhatsApp icon next to the number, signaling that the line receives messages.
- Product packaging and label, which stay with the customer long after purchase and support repurchase.
Each of these points is a place where conversation starts on its own, without media cost. And all become more efficient when they point to the same number — the central argument to consolidate the channel instead of spreading different lines across different materials.
What happens with calls
A frequent question: does registering the landline on WhatsApp interfere with normal phone calls? No. The line continues to receive and make calls as always, and WhatsApp runs in parallel, on the device or platform where the number is connected.
What changes is internal operation, and this requires coordination:
- Who answers the phone is not necessarily who replies to messages. Define both roles so no channel is left unattended.
- The customer can switch between channels, calling after messaging. Having the conversation history accessible to the call handler avoids asking the customer to repeat everything.
- Volume tends to migrate to messaging over time, which usually reduces call queues and frees phone attendants for other tasks.
In companies with receptionists, this transition is usually well received: messaging allows handling three conversations in parallel, which calls do not. Capacity gains appear within the first weeks.
One number, two behaviors
Concentrating calls and messages on the same number requires setting priorities. The rule that works in most operations is simple: calls have priority over messages in the moment, messages have priority over calls in the aggregate. Those on the call expect an immediate response; those who wrote expect a response within the promised timeframe, which must be met even on days with nonstop ringing.
Without this definition, the natural pattern is messages always losing out, because calls make noise and messages don’t. The result appears weeks later, in conversations answered hours late and customers who have already resolved elsewhere.
The business profile the number needs
- Name exactly matching the storefront and Google, so the customer recognizes who is responding.
- Description of what the company does and the area served.
- Business hours filled in, which sets correct expectations and reduces out-of-hours demands.
- Address and website, if any — these help build trust for customers receiving a message from the company for the first time.
- Consistent photo and identity, an item directly connected to name and badge verification.
An incomplete profile is the difference between seeming like a company and seeming like an unknown number — and at first contact, this perception decides whether the person responds or ignores.
Frequently asked questions
Is it possible to use a landline phone on WhatsApp?
Yes. During registration, when SMS verification fails or expires, the option to receive the code by call appears, read aloud to whoever answers the phone. Someone must be available at that moment, the line must receive direct external calls, and the number cannot be registered on another account.
Is it worth using the company’s old landline number on WhatsApp?
It usually is, because it leverages contact memory accumulated on storefronts, vehicles, business cards, and old ads. Companies with many years in the market receive dozens of monthly contact attempts through this number — and many who try do not seek another channel when not answered.
Should each salesperson have their own WhatsApp number?
No. A number per salesperson fragments the database, prevents organized lead distribution, and creates dependency on the person holding the device. Multiple agents work on the same number when there is a platform centralizing conversations, each with their own login.
Each conversation tagged in the right campaign
VeyloCRM identifies the origin of each conversation, responds immediately with a screening question, distributes to the team, and shows the cost per sale of each campaign.