Why is not possible to use the same number on Meta’s API and on a phone app?

It is not possible to use the name number on Meta’s API and on a phone app because a WhatsApp number registered as a “Business number on Meta” (on the Cloud API) is no longer compatible with the WhatsApp Business mobile app.

If you try to insert the same number, an error like this appears:

Open

In fact when you create a Business number on Meta:

• The number is linked to WhatsApp’s API infrastructure

• The account becomes a server-based account, not a device-based one

• WhatsApp disables access via the mobile app for that number

WhatsApp enforces this for security and access control reasons and to avoid conflicts between the mobile app and backend systems.

After phone number registration, you can proceed to configure your account on XCALLY with the relative webhooks to be able to receive messages on the interface.