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With WhatsApp, a phone number cannot be edited in the middle of the onboarding process.
When a phone number needs to be changed, we need to start with the same phone number activation process all over again. This means passing the new phone number – and its display name – for WhatsApp’s review. This process may take between 24 and 48 hours.
Therefore, to avoid further delays in your onboarding, please choose your phone number carefully. This means:
🚫 Once a phone number has been associated with the WhatsApp Business API, it cannot be downgraded to the consumer or business app.