Samsung has released another firmware update for the Galaxy S21 series. The new flagship trio has yet to reach customers, but the company has already released a first firmware update in anticipation of the phone’s looming market release, while a second rollout for the Galaxy S21 series takes place in countless regions.
As the Galaxy S21 series is not yet on the market, details of the change log of the second update are non-existent, but we can take a sensitive guess and assume that both firmware updates released so far are intended to twists during the Galaxy S21 / One UI 3.1 development process.
The Galaxy S21 flagship trio is available for pre-order and will be shipped to customers later this week on January 29th. The series uses Android 11 and One UI 3.1, and the firmware is virtually complete, although there are some bugs that need to be addressed. For example, SmartThings does not seem to work as well on the Galaxy S21 Ultra-run-before-free firmware, leading to huge loss of battery life.
Although it is unclear what changes the new update made to the Galaxy S21 series, the new firmware (versions) G991BXXU1AUAB / G996BXXU1AUAB and G998BXXU1AUAC) will be waiting for customers as they unpack the phones, assuming an even newer update will not be released by Samsung before. And if you want to download the latest firmware files from the Galaxy S21, you can refer to our firmware archive by using the links below.
Update: A screenshot revealing the latest change file for the Galaxy S21 Ultra firmware update was shared by a Reddit user. It mentions the improvement of the camera and overall performance, and it weighs about 278 MB.

- Model: SM-G991B
- Dimensions: Bar: 151.7 x 71.2 x 7.9 mm
- Show: 157.48 mm Dynamic AMOLED 2X 6.2 inches
- SVE: Exynos 2100
- Camera: 12MP

- Model: SM-G996B
- Dimensions: Bar: 161.5 x 75.6 x 7.8 mm
- Show: 6.7 inches / 170.18 mm Dynamic AMOLED 2X
- SVE: Exynos 2100
- Camera: 12MP

- Model: SM-G998B
- Dimensions: Bar: 165.1 x 75.6 x 8.9 mm
- Show: 6.8 inches / 172.72 mm Dynamic AMOLED 2X
- SVE: Exynos 2100
- Camera: 12MP