The process of downgrading WhatsApp Business API number is different from deleting WhatsApp/ WhatsApp Business App.
To downgrade your WhatsApp Business API number to normal WhatsApp, follow the below 👇
Go to your Facebook Business Manager.
Open Business Settings & choose WhatsApp Accounts from the left panel
If you have multiple WhatsApp Business API accounts, select the one you want to downgrade.
Go to 'Settings' & scroll down & click on 'WhatsApp Manager'.
Click on 'Account Tools' & choose 'Phone Numbers'.
Click the trash bucket icon to downgrade your WhatsApp Business API Account.
After downgrading, wait for a few minutes & log in to your WhatsApp/ WhatsApp Business App.
Note: Downgrading your WhatsApp Business Account is now a Reversible process. You can re-create a WhatsApp Business API account using the same phone number. But, you'll permanently lose all data including messages, contacts & more stored in the WhatsApp Business API account.
If you want to downgrade your number from WhatsApp/ WhatsApp Business app & switch to WhatsApp Business API, check out this article.
To know more, connect with our support team.