Galaxy S21|S21FE(Exynos2100) - update OneUI8.5[Android16]

The Elite UI ROM is a custom ROM that brings the AI features of newer Galaxy phones to the S21 series, which are not available on the official One UI 8.5 update. Key features include enabling all AI functionality from newer devices, but this requires unlocking the bootloader and flashing the ROM, a process that comes with risks and is not officially supported. The ROM aims to extend the life of the S21 by providing features that would otherwise be exclusive to newer hardware.

Support devices : Exynos 2100
- S21(o1s) : SM-G991B, G991B/DS
- S21FE(r9s) : SM-G990E

Download links :
- S21(o1s) : https://drive.google.com/file/d/1uu-vFZme-iz4Y1G2kEpM8tL6Mx3xjvfT/view
- S21(o1s)(G991B) recovery : https://github.com/xfwdrev/Action-Recovery-Builder/releases/tag/20260316034753
- Patched_vbmeta.tar : https://github.com/UN1CA/proprietary_vendor_samsung_exynos2100/releases/tag/G991BXXSJHZC2_XEO_OXM

- S21FE(r9s) : https://drive.google.com/file/d/1wbxa2orGMzOSfoQKnq74GQ73rmWVzpgM/view
- S21FE(r9s)(G990E) recovery : https://github.com/xfwdrev/Action-Recovery-Builder/releases/tag/20260316034710
- Patched_vbmeta.tar : https://github.com/UN1CA/proprietary_vendor_samsung_exynos2100/releases/tag/G990EXXSIGYI3_TPA_OWO

- Odin3 : https://samsung-odin.en.uptodown.com/windows/download

- Samsung USB driver : https://developer.samsung.com/android-usb-driver

- ADB platform tools : https://android-sdk-platform-tools.en.uptodown.com/windows

Installation method :
1- Install Samsung USB driver on PC
2- OEM Unlocking (unlock bootloader)
3- Flash custom recovery
4- Flash ROM through ADB sideload
5- Reboot system

For more information:
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Видео Galaxy S21|S21FE(Exynos2100) - update OneUI8.5[Android16] канала Tech Me Solution