Samsung

Samsung Galaxy A21s

codename a21sSamsung Exynos 850released 2020

Specifications

SoC: Samsung Exynos 850
Released: 2020

3 custom ROMs available

New to flashing? It generally means unlocking the bootloader, booting a custom recovery, wiping, then installing the ROM — exact steps differ per device and ROM, so follow the Install guide for the one you pick, and back up first.

LineageOSOfficial
Android 16v23.2by DaemonMCR
Install guide Download
/e/OSUnofficial
Android 16
Install guide Download
crDroidOfficial
Android 16v12.9by Mustafaupdated Apr 19, 2026
Install guide Forum Download

ROM availability and links come from each project. Always verify compatibility and back up before flashing — CustomDroid is a directory, not a download host.