The Change Number feature allows you to change the phone number associated with your WhatsApp account on the same phone. This feature is intended to be used before you verify your new number.
Using the Change Number feature in WhatsApp will:
If you use our Change Number feature, your chat history will continue to be available on your phone with the new phone number as long as you continue using the same phone.
You can also change your WhatsApp number on your device by simply inserting your new SIM into your phone and opening WhatsApp. WhatsApp should prompt you to re-verify your new phone number.
Note: If you do not use the Change Number feature, your account information, groups, settings and messages will not be migrated.
Please make sure your WhatsApp contacts have your new phone number saved in their phone’s address books to ensure a seamless messaging experience.