If you are getting both a new Windows Phone and a new phone number, use Change Number before migrating your chat history to the new phone.
Change your WhatsApp chat history from your old Windows Phone to the new one. To transfer, you must either have a OneDrive backup or have an SD card. It is not possible to migrate your chat history from Windows Phone to Android or iPhone.
To move your chats from OneDrive to your new phone:
To move your chats to your new phone via SD card:
Note: It may take some time to migrate your chat history depending on your Internet connection and the size of your backup.. Make sure you have a strong and stable Wi-Fi connection. We recommend keeping your phone plugged into power until the backup is complete.