I have had my S21 Ultra for a few days now and I'm so glad I paid that bit extra, I love the phone. I have no heating/warming up issues, fingerprint sensor is amazingly fast, smooth movements between apps and camera is the best I have seen on a phone, although I need to test this out more. Below are my benchmark results and battery performance details, I have the highest settings on, hopefully the screen on time will improve as the battery gets use to my usage.
My latest benchmark 😁
Even better battery after new update!
