Samsung Galaxy S21 5G

Firmware is specific to the model code. Find yours on the box or in Settings › About phone, then pick it below.

ModelSold inFirmwareLatest build

SM-G991BSold in74 countriesFirmware170 CSCs · 10,224 buildsLatest buildG991BXXUJHZF2 · Jun 30, 2026→

One UI and Android versions of the Galaxy S21 5G, with the first release of each.

1. May 2025

   One UI 7 · Android 15

   Official release: G991USQUEHYDA (SM-G991U)

2. May 2024

   One UI 6.1 · Android 14

   Official release: G991BXXUAGXDA (SM-G991B)

3. Nov 2023

   One UI 6 · Android 14

   Official release: G991BXXU9FWK2 (SM-G991B)

4. Feb 2023

   One UI 5.1 · Android 13

   Official release: G991BXXU6EWAF (SM-G991B)

5. Nov 2022

   One UI 5 · Android 13

   Official release: G991BXXU5DVJC (SM-G991B)

6. Mar 2022

   One UI 4.1 · Android 12

   Official release: (SM-G991B)

As published by Samsung for the SM-G991B; other model codes can differ (chipset, network bands).

Sold in 72 countries.