Which Phone Number for WhatsApp Business API? Rules

What if the number is already on WhatsApp?

A number already in use with WhatsApp cannot be registered unless it is deleted first. Meta's documentation states this, and also says a banned number must be unbanned through the appeal process before registration.

You have three options:

For coexistence, the business uses Embedded Signup with a provider, and Meta's documentation describes these effects: the business keeps using the Business app, companion apps are unlinked at onboarding, group chats are not synchronised, existing broadcast lists become read-only, and up to six months of chat history can be synchronised. Messages sent from the app stay free. Meta requires a minimum version of the Business app, so check the current requirement before you start.

If you are moving a number that is already on the API from one provider to another, that is a migration rather than a new registration. See migrating a WhatsApp number between providers.

How many phone numbers can one business register?

A new business portfolio can register two business phone numbers. Meta's documentation says the cap rises to 20 when the business is verified or reaches a messaging limit of 2,000.

Messaging limits are set at portfolio level and shared by all numbers in the portfolio, so one number can use the whole capacity in a period. When you plan multiple numbers, for example sales, support and billing, think about what each does:

• one number per market, so the country code looks local;
• one number per brand, with its own display name;
• one number for marketing and another for service, which makes quality easier to read.

Every number needs its own display name; see the display name guide. Raising the cap is one reason to complete business verification. Check your portfolio's current cap in Business Suite.

Are there country considerations?

Yes, mostly in how numbers look and who can receive the verification call. Pick a number that matches the market you serve and check that your provider can deliver codes to it.

• Local vs foreign numbers. A UAE-based business can register a +971 number; a business serving Saudi customers can register a +966 number if it holds one. Some customers trust a local number more.
• Formatting. Meta notes that for Brazil and Mexico the Cloud API may add an extra prefix to numbers, which is treated as normal behaviour. Always store numbers in E.164 format; our phone number formatter validates them.
• Telecom rules. Local rules on who can hold or rent a number can differ by country. Ask your telecom provider and the regulator rather than assuming a foreign or virtual number is allowed.

Our market pages explain the local context, such as WhatsApp in the UAE and WhatsApp in Saudi Arabia.

How do you keep ownership of the number?

Keep the number registered in your company's name, with your own business portfolio as the owner of the WhatsApp Business Account. If a provider holds the number in its name, you cannot move it, recover it or prove ownership.

• Buy or keep the number from a telecom operator under your company name.
• Keep the portfolio under your admin accounts, with at least two admins.
• Store the two-step PIN in a shared password manager.
• Only a business portfolio admin can delete a business phone number, and Meta does not allow deletion if the number sent paid messages in the last 30 days.
• Do not let a provider reassign a number you rely on without a written plan.

Embedded Signup, which BroadNet uses, creates the account under your Meta assets from day one.

What are the common mistakes?

• Using a personal SIM. A number a staff member leaves with is hard to recover.
• Choosing a short code or a premium line. Short codes are unsupported.
• Starting verification without the phone at hand. Make sure someone can read an SMS or answer the voice call when you request the code.
• Ignoring the existing WhatsApp account. The number must be deleted or connected through coexistence first.
• Registering through a virtual provider that blocks international SMS. Use voice or choose another number.
• Forgetting the cap. Plan a verification before you need the third number.

Worked example: a Jeddah retailer

"Waha Market", a synthetic grocery chain, wants one support number and one marketing number. Its support team already uses the Business app on the shop's mobile, and marketing has a landline from the head office.

The team connects the shop's Business app number through coexistence with a provider, accepting that broadcast lists become read-only, and registers the landline by voice call. Both numbers are in the company's name and sit in one portfolio with two admins. They apply for verification before the third number is needed, since a new portfolio is capped at two. Each gets a display name with the brand and the department.

How OmniChannels.ai helps

OmniChannels.ai onboards WhatsApp Business API numbers through Meta Embedded Signup, so the number, portfolio and display name sit under your own Meta assets. BroadNet is an official Meta Business Solution Provider, and our team prepares the number registration, business verification and display name with you; approval decisions stay with Meta. Use the WhatsApp API readiness checklist to test your number, then book a demo. Verification codes by call are related to the voice API page.