I had an Xperia for a while but kept my iPhone and then installed the iOS 26 beta on it. Expectation was that it would run but be pretty painful. Surprisingly, even the beta ran so fine that I sold the Xperia and switched back to iOS. And it's still my daily driver.
Runs like crap on my daughter's 12 mini.
Actually what does "surprisingly smooth" mean? Better than you expected? Or actually smooth?
I had an Xperia for a while but kept my iPhone and then installed the iOS 26 beta on it. Expectation was that it would run but be pretty painful. Surprisingly, even the beta ran so fine that I sold the Xperia and switched back to iOS. And it's still my daily driver.