1. If you want to use the number in WhatsApp personal / business apps :
Note: After having used a number in a WhatsApp API account, you can shift the number back to WhatsApp personal / business apps, only if there has been no exchange of messages on the number for at least 30 days.
To delete the number from your WhatsApp API account:
• Go to https://business.facebook.com/settings and log in with your Facebook credentials. Then select the FB Business, which contains your WhatsApp API account.
• Under Business Settings, go to Accounts > WhatsApp Accounts.
• Select your existing WhatsApp API account
• Once selected, go to Settings (middle section) > WhatsApp Manager.
• Click on the ‘Phone Numbers’ tab on the left menu panel.
• Click the Delete icon for the phone number that you want to de-register.
2. If you want to use the number in a Whatsapp API account with another BSP :
• First, disable 2FA:
– Go to https://business.facebook.com/settings and log in with your Facebook credentials. Then, select the FB Business, thatwhich contains your WhatsApp API account.
– Under Business Settings, go to Accounts > WhatsApp Accounts.
– Select your existing WhatsApp API account.
– Once selected, go to Settings (middle section) > WhatsApp Manager.
– Click on the ‘Phone Numbers’ tab on the left menu panel, and go to Two-Step verification.
– Click on Turn off two-step verification and wait for the e-mail from Facebook.
– From the On the email received received from Facebook, click on the link to disable the to 2FA pin.
•Then, ask the other BSP to help you to connect the number to their portal.