I have a Galaxy S21 Plus 5G on T Mobile so I have been fortunate enough to be able to get the One UI 4.0 Beta. If you are able to receive the Beta as well, I highly recommend clearing the cache of your phone after updating. This will help mitigate some issues. With that said, so far my experience is pretty smooth compared to Beta's I have tested in the past. The main problem I am having is that the variable refresh rate for scrolling is not consistent. In some apps it's better than Android 11, then others it's like chunk city as if I was playing a pc game at 25 fps! Also don't be surprised if some apps don't work in the beta. This is Beta. For me, Offer Up app will launch but will not send or receive data no matter what I do. I will keep you updated on my experiences going forward. Oh by the way, check out the device care section, it's pretty cool!
Yes, same problem. The first beta, variable refresh rate is not stable. Hope Samsung can fix it as soon as possible… Refresh rate is very obvious that make device slow
New update. The One UI 4.0 beta is killing my battery life compared to One UI 3.0 Android 11! I am using my phone the same, and normally I can get through almost two days on a single charge on this S21 Plus 5G. At this rate I will be charging my phone every night.