Number Porting means that a phone number that is already registered in the WhatsApp Business API can be moved between WhatsApp Business API accounts. This allows for businesses to change BSPs (Business Solution Provider) or move their number to a new account, but only if the source and destination Facebook Business Manager IDs are the same. After being migrated, a phone number keeps its display name, quality rating, messaging limits, Official Business Account status, and any high quality message templates previously approved.
Migration of account
Template Messages and chat history migration Only the high quality message templates are migrated on this process. In practice, they are copied to the destination WABA. These templates do not need to go through review again and can be sent immediately. Low quality, rejected, or pending templates are not migrated. Any existing message templates in the destination WABA will not be overwritten. Message and chat history are not migrated with this process.
Billing Migration Messages sent before migration are charged to the source BSP. Messages sent after migration are charged to the destination BSP. Messages sent from the source, and that are not delivered before migration, are still charged to the source BSP when they get delivered.
Official Business Accounts (Green Badge) Official Business Accounts (OBAs) can be migrated between WABAs. The only requirement is that the two-factor authentication needs to be disabled during the migration process. It can be re-enabled after the number is migrated.