https://wccftech.com/samsung-starts-internally-testing-android-12-based-one-ui-4-0/

Samsung is set to roll out the One UI 4.0 beta based on Android later this month, and the Galaxy S21 series will be the first to receive the update. The company has also announced that the beta will be available for Sprint, T-Mobile, and unlocked units in the U.S. Now, it appears that Samsung has started testing the update internally but in China at the moment.

Samsung seems to be testing the Android 12-based One UI 4.0 beta software for the Galaxy S21 series, the firmware version is G99x0ZCU2ZUHI, and while we do not have access to a changelog for the firmware, that does not mean that there are no new features. According to a tweet from a renowned tipster, Ice Universe, the new update brings UI modifications, a transparency effect in the notifications section, improved animations, and a new charging animation that you can check out in the tweet below.