Hi @AndrewHou Do some research, it is true that some users have encountered lags or problems with apps but these should be sored out over time. Some apps will not be fully compatible with Android 12 at the moment. However a number have been impressed with UI 4.0 Android 12 and have enjoyed the experience. I took part in the Beta and and only had minor issues, there were still a few bugs in first stable release but a fix has since been applied. Of course some members still have issues but it has gone well for me. I agree with @tinglish , it certainly is advisable to wipe the cache partition and use the Galaxy App Booster after updates.
The changelog is here if you are interested:https://www.ytechb.com/one-ui-4-0-changelog/
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
