Send the following on WhatsApp
Continue to ChatDownload and install One UI 2.1 for Galaxy Note 9 https://www.androidsage.com/2020/06/11/download-and-install-one-ui-2-1-for-galaxy-note-9/
Download and install One UI 2.1 for Galaxy Note 9 https://www.androidsage.com/2020/06/11/download-and-install-one-ui-2-1-for-galaxy-note-9/