Managing WhatsApp Business Calls: A UK Guide for 2026

Businesses asking how to block calls on WhatsApp Business have often tried the obvious route, only to find it doesn't quite work. Blocking a contact, silencing unknown callers, and disabling calls are three different operations, with distinct effects on the customer on the other end of the line. This guide explains which method to use in each scenario, what Meta currently allows on the Official API, and the potential cost in lost sales for UK businesses.

TL;DR — the short answer before the detail

• Blocking a number (Privacy → Blocked) stops calls, messages, and status updates from that contact – but it's a one-by-one process, not scalable.
• Silencing unknown callers (Privacy → Calls) stops your device ringing for those not in your contacts; the call still appears in the Calls tab and notifications.
• Disabling "Receive calls" in the app makes the call button disappear from the chat – but this is a device-specific setting, not account-wide.
• On the Official API (Cloud API), control is via a field: POST /<PHONE_NUMBER_ID>/settings with calling.status = "DISABLED". This applies to the entire number, for all agents.
• There's a better approach than simply switching on/off: call_hours (operating hours by timezone and holiday) and callback_permission_status (request for a return call).
• Deciding how to block calls on WhatsApp Business without considering your sales funnel is the most expensive mistake: in telemedicine, property inspections, and proof of life services, the call *is* the conversion.

Blocking, silencing, and disabling are not the same thing

This confusion explains almost all the support we receive on the topic. Those looking for how to block calls on WhatsApp Business usually want one of the three – and choose the wrong one. The three actions solve distinct problems and produce distinct experiences for those trying to contact the company.

Action	Location	What the customer perceives	Scope
Block contact	Privacy → Blocked	The call doesn't connect, and messages show a single tick	One number at a time
Silence unknown callers	Privacy → Calls	Hears the "ringing" tone normally – assumes they've been ignored	All numbers not in contacts
Disable "Receive calls"	App Settings → Call Settings	The call button disappears from the conversation	Only on that device
calling.status = DISABLED	POST /<PHONE_NUMBER_ID>/settings	The call icon disappears from the chat and business profile	The entire number, for the whole team

Remember the difference between "the button doesn't exist" and "you didn't answer". The first is a declared company policy. The second is, for the customer, a perceived disregard. Having worked with WhatsApp customer service since the Business Platform launched in Brazil, I've seen this distinction damage more brand reputations than any delayed response.

How to block calls on WhatsApp Business App in three ways

This section applies to those using the free application, downloaded from the Play Store or App Store. There are three ways to block calls on WhatsApp Business in the app, from the most surgical to the most radical.

1. Block a specific number

Open the chat, tap the contact's name, and choose Block. Or go directly to Settings → Privacy → Blocked → Add. Blocking immediately stops calls, messages, and status updates from that number. If you change your mobile while keeping the same account, the blocked list transfers with it.

This is the right approach for the persistent customer who calls seven times in a row, for a competitor scouting prices, or for a number already reported as a scam. It's not the solution for volume: blocking a hundred numbers requires a hundred manual repetitions.

2. Silence unknown callers

In Settings → Privacy → Calls, activate Silence unknown callers. According to the WhatsApp Help Centre, those not in your contacts will no longer make your device ring – but the call will still be registered in the Calls tab and will still generate a notification.

This solves noise, but not workflow. The agent still needs to review the list to determine if that missed call was spam or a hot lead who gave up. In operations with response targets, silencing without a triage process merely shifts the problem.

3. Turn off "Receive calls" completely

Tap the three dots in the top right corner, go to App Settings → Call Settings, and deactivate Receive calls. The phone icon disappears from the conversation, and the number stops accepting calls.

The detail no one tells you: this setting lives on the device. Formatted the mobile, reinstalled the app, or if a new agent logs in with a different device? It reverts to default without warning anyone. If your answer to how to block calls on WhatsApp Business needs to survive team changes, the app is not the right place to store it.

How to block calls on WhatsApp Business via the Official API

On the WhatsApp Business Platform, behaviour is declared via API – and this changes everything, because the configuration becomes auditable, versionable, and consistent for all agents. It's the only way to block calls on WhatsApp Business that survives device and team changes.

Meta's call settings documentation describes the endpoint:

POST /<PHONE_NUMBER_ID>/settings

{
  "calling": {
    "status": "DISABLED",
    "call_icon_visibility": "DISABLE_ALL"
  }
}

There are two fields with different effects:

• status accepts ENABLED or DISABLED and switches the call feature on or off for the number.
• call_icon_visibility accepts DEFAULT or DISABLE_ALL. With DISABLE_ALL, the call button disappears from the chat and business profile – but Meta itself warns that users may still attempt unsolicited calls.

Three requirements and limits you need to know before trying:

1. The number must be active on the Cloud API, not the application. The two are mutually exclusive.
2. To enable calls in production, Meta requires a message limit of at least 2,000 unique recipients per day.
3. Configuration changes can take up to 7 days to reflect for WhatsApp clients. It's not instantaneous, and planning a last-minute cutover will likely fail.

If you're still deciding between the two platforms, the comparative WhatsApp Business App vs Official API and the complete guide to the WhatsApp Cloud API cover the selection criteria. For the step-by-step focused on disabling the feature, the sister guide to this post is Disable calls on WhatsApp Business.

The middle ground almost no one configures: hours and callbacks

Turning everything off is the lazy solution. The Official API offers two fields that solve the real problem – "I don't want calls outside business hours" – without closing the channel entirely.

call_hours: the channel opens and closes automatically

You declare a timezone (e.g., Europe/London for UK businesses) and the service windows per day of the week. Outside these, WhatsApp hides the call option and suggests the customer send a message. Meta's rules: a maximum of 2 windows per day, with no overlap, and up to 20 calendar exceptions for holidays and breaks.

In practice, it's the difference between "this company doesn't offer phone support" and "this company offers phone support from 8 am to 6 pm". The second message costs nothing and preserves the perception of availability.

callback_permission_status: the customer requests a return call

With the field set to ENABLED, after a missed or ended call, WhatsApp offers the user the option to request a return call. You receive the request via webhook and call back when an agent is free. It's the queue the free app never had.

Before deciding how to block calls on WhatsApp Business, run a test: use this pair of fields for two weeks. In most operations I've observed, the volume of unwanted calls decreases naturally when hours become explicit – and no lead is left without a path to a return call.

Meta's rules that already block calls for you

Many businesses disable calls due to fear of abuse that the platform already limits. The call permissions documentation provides concrete numbers, and it's worth knowing them before making a decision:

• 1 permission request every 24 hours and a maximum of 2 in 7 days, per business-user pair.
• Granted temporary permission is valid for 7 consecutive days (168 hours); permanent permission does not expire, but the user can revoke it at any time.
• Each business number can make a maximum of 100 connected calls every 24 hours, combining those initiated by the business and the customer.
• 2 consecutive unanswered calls trigger a system message suggesting the user reconsider; 4 consecutive calls automatically revoke permission.
• Business-initiated calls are not available in the United States, Canada, Egypt, Vietnam, and Nigeria. Video is still listed as a planned feature.

In other words: aggressive telemarketing via WhatsApp is already structurally unfeasible. Businesses asking how to block calls on WhatsApp Business due to spam from other companies gain more by blocking persistent numbers and reporting them, rather than closing their own communication channel.

When not to block – and what it costs

Knowing how to block calls on WhatsApp Business doesn't mean you should. There are scenarios where disabling calls is the wrong business decision, and it consistently appears in the same sectors:

• Healthcare and telemedicine: voice consultation is the product. Blocking calls means blocking revenue.
• Insurance and inspections: proof of life, remote assessments, and video inspections depend on calls within the same channel the customer is already using.
• Estate agents and car dealerships: high-value tickets, long decision cycles, customers who want to speak to someone before booking a visit.
• Critical technical support: five minutes on a call can resolve what thirty messages cannot.

The standard in these cases is not an on-off switch: it's well-configured call_hours, a customer service queue, and routing that knows who to direct the call to. Total blocking in these sectors is revenue loss disguised as productivity.

There's also the opposite case, where blocking is the right choice: transactional broadcast numbers, OTP numbers, and automated billing numbers should not receive any calls. There, calling.status = DISABLED is good practice, not a restriction.

Three traps for those who only configure the app

Before choosing how to block calls on WhatsApp Business, check if your operation isn't falling into one of these traps.

The configuration is not auditable. In the app, no one can prove in an audit what the call policy was on a given date. On the API, the configuration is a queryable state of the number – and this matters for those responding to compliance or UK GDPR (Data Protection Act 2018) enquiries.

The configuration does not scale. With two or three agents and several linked devices, the policy becomes a matter of luck. Just one device with the option enabled allows customers to call and no one to answer.

The improvised workaround is worse than the problem. Companies trying to circumvent the app's limits with an unofficial API enter directly into the territory of number banning, a topic I've detailed in WhatsApp Business Bans: The 2026 Trend in Brazil. Losing your number costs much more than tolerating a few calls.

How Agathas Web solves this

When the problem shifts from "I want it to stop ringing" to "I want control over who speaks to the company, when, and via which channel", the answer to how to block calls on WhatsApp Business is to migrate to the Official API with a platform that exposes these configurations without you needing to write code.

This is exactly what Voyia does. It's our customer service platform built on Meta's Official WhatsApp Business API, developed and operated here by Agathas Web. What's included:

• Multi-agent inbox with queues, agent transfers, and real-time conversations – the routing layer the free app lacks.
• Official API number, with verification guided step-by-step by our team. This prerequisite unlocks the calling, call_hours, and callback_permission_status fields.
• No-code chatbot and bulk messaging with Meta-approved templates, to redirect to text what currently becomes a call.
• AI integration using your own key – Claude, GPT, Gemini, or another model – without vendor lock-in.
• Delivery, read, and response time reports, so you can measure whether blocking calls improved or worsened customer service.
• Zero markup on Meta messages: we pass on the official rate, invoiced in Pounds Sterling (£) with a VAT invoice.

How to sign up: you choose one of the three plans (Starter, Professional, or Business) on the Voyia page, pay in GBP (£) without a long-term contract, and we connect your number to the Official API. Each plan includes one WhatsApp number. From signing up to the first customer interaction usually takes a few hours, and support is in Brazilian Portuguese, during business hours.

We are developers before we are licence sellers: Agathas Web has been working since 2008 with infrastructure, Linux servers, Moodle, and bespoke development. If your operation requires call routing that isn't off-the-shelf, we build it.

Conclusion: blocking is an operational decision, not a configuration one

The question of how to block calls on WhatsApp Business has a simple technical answer and a difficult operational one. The technical part fits into three taps in the app or a POST to the Cloud API. The operational part requires knowing who calls, why they call, at what time, and the value of each of those calls.

Start by measuring a week of incoming calls before turning anything off. If most are outside business hours, configure call_hours. If it's spam from repeated numbers, block them one by one. If calls simply aren't part of your product, disable them via the API and you're done – with the certainty that the policy applies to the entire team.

If the next step is to move beyond the app and gain real control over the channel, discover Voyia and speak to our team.