I have an A52s and I am on Vodafone. The only problem I had was that my mobile data wasn't working, but it was a case of ticking it again to get it to start working. Apart from that I am very happy with the update.
My only issue is the Play Store apps that stopped updating after the update. Other than that, everything else has been fine. Like the new colour schemes etc... if you don't know what's in the software update update for One UI 4, here's a YouTube link - https://youtu.be/x8ZbNtnYKcA