Samsung officially launched the Galaxy S21 series smartphones at the Unpacked event on January 14, 2021, The Galaxy S21 series has three new smartphones – Galaxy S21 Ultra, S21+, and S21 which comes with the latest flagship hardware.
Samsung has started rolling the Android 11 based One UI 3.1 update and it brings January 2021 security patch software update for the Galaxy S21 Plus. The new update comes on build number G996BXXU1AUA4.
The update brings no major changes apart from the security fix and minor update to improve the performance. It started seeding via OTA (over the air) for users around the globe with a device mode (SM-G996B). If you have not received this OTA update.