The steps to delete the WhatsApp account
A phone number cannot be used for WhatsApp Business or the consumer app once it has been registered on the WhatsApp Business API. It is possible to upgrade a phone number to the WhatsApp Business API but not the reverse.
To delete your account
- Open WhatsApp.
- Tap More options > Settings > Account > Delete my account.
- Enter your phone number in full international format and tap DELETE MY ACCOUNT.
- Select a reason for why you're deleting your account in the dropdown.
- Tap DELETE MY ACCOUNT.
Deleting your account will:
- Delete your account from WhatsApp.
- Erase your message history.
- Delete you from all of your WhatsApp groups.
- Delete your backup.