whilst a bit of a blunder in Australia, the Uk release should hopefully be fine. I will stress the importance of backing up. Some of the bug fixes detailed here: https://www.sammyfans.com/2023/01/03/samsung-january-2023-update-patches-20-sves/
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My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 5.0,Android 13 .