I got AUB9 on a brandnew S21Ultra. The phone was factory reset before even installing anything, cache cleared. Cam drains battery ENORMOUSLY, without showing anomalous use. This phone is an utter catastrophy and goes back immediately for a refund. This was my last samsung phone EVER. Not going back. Exynos needs to finally die. The overall software is amazing, but this is all useless without a battery. I'll switch to the OnePlus 9 pro. Please, STOP telling people that avoiding smart switch will help, It's a lottery at best and there are a billion other issues that will never be fixed. Refund your phones if you experience this, don't listen to that pathetic: "iT nEeDs tO lEaRn uSAgE pAtTeRn" No other brand needs this, and no other brand has systemic drain issues. No, samsung, this phone doesn't need to learn anything, a 1300 dollar phone just needs to work out of the box, like other flagships. You don't deserve this, folks, ditch samsung and make them respect the customer, this is UTTERLY SHAMEFUL business practice.
I have the same Exynos phone, S21 Ultra, on the same firmware release, AUB9 on CSC code BTU, and did not use Smart Switch to set up my device or import any apps or settings.
I wonder why there is such a difference.
