Galaxy S21 5G SM-G991U updates & firmware
This page tracks every software update Samsung's update servers list for the Samsung Galaxy S21 5G (SM-G991U). The latest stable build is G991USQSJHZB1 (Android 15, security update), first released on Mar 17, 2026. Samsung has published 123 stable builds for this model since Jan 14, 2021: 65 security and 58 feature updates, from Android 11 to Android 15. The current bootloader (binary) version is 19. A device on bit 19 only accepts firmware with bit 19 or higher – see downgrading and the bootloader bit.
Rollout: build G991USQSJHZB1 (Android 15 (One UI 7)) is live in all 8 regions, first released on Mar 17, 2026 in ATT (USA (AT&T)).
- Latest build
G991USQSJHZB1- Released
- Mar 17, 2026
- Android
- Android 15
- Bootloader bit
- 19
- Regions
- 8
- Stable builds
- 123
Update policy
Samsung has not published an update commitment for the Galaxy S21 5G. According to our data it is on Android 15 (One UI 7), last build released Mar 17, 2026. No new firmware has appeared on Samsung's servers since Mar 17, 2026.
Compare all models: Samsung update policy by model.
Latest firmware by region (CSC)
Samsung builds firmware per region code (CSC). Pick the code that matches your device – it is shown under Settings › About phone › Software information › Service provider software version. Follow a code for its complete history.
| CSC | Region | Latest build | Android | Released | Builds |
|---|---|---|---|---|---|
ATT | USA (AT&T) | G991USQSJHZB1 | Android 15 | Mar 17, 2026 | 65 |
CCT | USA (Comcast) | G991USQSJHZB1 | Android 15 | Mar 18, 2026 | 66 |
DSA | USA | G991USQSJHZB1 | Android 15 | Mar 19, 2026 | 48 |
DSH | USA | G991USQSJHZB1 | Android 15 | Mar 19, 2026 | 54 |
SPR | USA (Sprint) | G991USQSJHZB1 | Android 15 | Mar 18, 2026 | 69 |
TMB | USA (T-Mobile) | G991USQSJHZB1 | Android 15 | Mar 18, 2026 | 66 |
USC | USA (US Cellular) | G991USQSJHZB1 | Android 15 | Mar 25, 2026 | 64 |
VZW | USA (Verizon) | G991USQSJHZB1 | Android 15 | Mar 22, 2026 | 67 |
Firmware history (123 builds)
Every stable build (PDA version) Samsung has published for the SM-G991U, newest first. “Released” is the earliest date the build appeared on Samsung's servers in any region (how dates work). “pulled” means Samsung no longer serves the file for that build, usually because newer builds replaced it (details).
| Build (PDA) | Released | Android | Type | Bit | Regions | File |
|---|---|---|---|---|---|---|
G991USQSJHZB1 | Mar 17, 2026 | Android 15 | Security | 19 | 8 | on server |
G991USQSJHZAA | Jan 28, 2026 | Android 15 | Security | 19 | 8 | on server |
G991USQSIHYL1 | Dec 17, 2025 | Android 15 | Security | 18 | 8 | on server |
G991USQSHHYI1 | Sep 24, 2025 | Android 15 | Security | 17 | 8 | on server |
G991USQSGHYF2 | Jun 25, 2025 | Android 15 | Security | 16 | 8 | on server |
G991USQSFHYE2 | Jun 4, 2025 | Android 15 | Security | 15 | 8 | on server |
G991USQUEHYDA | Apr 30, 2025 | Android 15 | Feature | 14 | 8 | on server |
G991USQSEGYA5 | Feb 24, 2025 | Android 14 | Security | 14 | 8 | on server |
G991USQSEGXLB | Jan 12, 2025 | Android 14 | Security | 14 | 8 | on server |
G991USQSEGXK3 | Dec 13, 2024 | Android 14 | Security | 14 | 8 | on server |
G991USQSEGXJ4 | Nov 13, 2024 | Android 14 | Security | 14 | 8 | on server |
G991USQSDGXJ2 | Oct 15, 2024 | Android 14 | Security | 13 | 8 | on server |
G991USQSCGXH2 | Sep 12, 2024 | Android 14 | Security | 12 | 8 | on server |
G991USQUCGXGA | Aug 12, 2024 | Android 14 | Feature | 12 | 8 | on server |
G991USQSCGXF3 | Jul 11, 2024 | Android 14 | Security | 12 | 8 | on server |
G991USQSBGXF1 | Jun 11, 2024 | Android 14 | Security | 11 | 8 | on server |
G991USQSBGXE2 | May 20, 2024 | Android 14 | Security | 11 | 8 | on server |
G991USQUAGXDE | May 10, 2024 | Android 14 | Feature | 10 | 8 | on server |
G991USQSAFXD4 | Apr 14, 2024 | Android 14 | Security | 10 | 1 | on server |
G991USQSAFXD2 | Apr 14, 2024 | Android 14 | Security | 10 | 1 | on server |
G991USQSAFXD1 | Apr 11, 2024 | Android 14 | Security | 10 | 2 | on server |
G991USQSAFXD3 | Apr 10, 2024 | Android 14 | Security | 10 | 4 | on server |
G991USQSAFXBD | Mar 17, 2024 | Android 14 | Security | 10 | 1 | on server |
G991USQSAFXC4 | Mar 17, 2024 | Android 14 | Security | 10 | 1 | on server |
G991USQSAFXC2 | Mar 14, 2024 | Android 14 | Security | 10 | 4 | on server |
G991USQSAFXBC | Mar 12, 2024 | Android 14 | Security | 10 | 2 | on server |
G991USQSAFXAF | Feb 20, 2024 | Android 14 | Security | 10 | 1 | on server |
G991USQSAFXAE | Feb 19, 2024 | Android 14 | Security | 10 | 2 | on server |
G991USQSAFXAG | Feb 15, 2024 | Android 14 | Security | 10 | 1 | on server |
G991USQSAFXAI | Feb 12, 2024 | Android 14 | Security | 10 | 4 | on server |
G991USQS9FXA4 | Jan 24, 2024 | Android 14 | Security | 9 | 1 | on server |
G991USQS9FXA2 | Jan 18, 2024 | Android 14 | Security | 9 | 2 | on server |
G991USQS9FXA3 | Jan 18, 2024 | Android 14 | Security | 9 | 4 | on server |
G991USQS9FXA1 | Jan 17, 2024 | Android 14 | Security | 9 | 1 | on server |
G991USQU9FWL6 | Dec 21, 2023 | Android 14 | Feature | 9 | 1 | on server |
G991USQU9EWL2 | Dec 20, 2023 | Android 13 | Feature | 9 | 1 | on server |
G991USQS9FWL1 | Dec 19, 2023 | Android 14 | Security | 9 | 2 | on server |
G991USQS9FWL2 | Dec 17, 2023 | Android 14 | Security | 9 | 4 | on server |
G991USQU9FWKC | Dec 12, 2023 | Android 14 | Feature | 9 | 1 | on server |
G991USQU9FWK9 | Dec 6, 2023 | Android 14 | Feature | 9 | 4 | on server |
G991USQU9FWK5 | Dec 4, 2023 | Android 14 | Feature | 9 | 2 | on server |
G991USQS9EWK2 | Nov 14, 2023 | Android 13 | Security | 9 | 1 | on server |
G991USQS9EWK1 | Nov 13, 2023 | Android 13 | Security | 9 | 7 | on server |
G991USQS9EWI8 | Oct 17, 2023 | Android 13 | Security | 9 | 1 | on server |
G991USQS9EWI2 | Oct 5, 2023 | Android 13 | Security | 9 | 7 | on server |
G991USQS9EWI7 | Sep 27, 2023 | Android 13 | Security | 9 | 1 | on server |
G991USQS9EWI1 | Sep 20, 2023 | Android 13 | Security | 9 | 7 | on server |
G991USQU8EWI5 | Sep 11, 2023 | Android 13 | Feature | 8 | 1 | on server |
G991USQU8EWH6 | Aug 29, 2023 | Android 13 | Feature | 8 | 7 | on server |
G991USQS8EWH1 | Aug 16, 2023 | Android 13 | Security | 8 | 3 | on server |
G991USQS8EWF1 | Jul 16, 2023 | Android 13 | Security | 8 | 4 | on server |
G991USQS8EWG1 | Jul 16, 2023 | Android 13 | Security | 8 | 4 | on server |
G991USQU7EWF4 | Jul 9, 2023 | Android 13 | Feature | 7 | 4 | on server |
G991USQU7EWE5 | Jun 16, 2023 | Android 13 | Feature | 7 | 4 | on server |
G991USQS7EWF1 | Jun 14, 2023 | Android 13 | Security | 7 | 4 | on server |
G991USQS6EWD4 | May 14, 2023 | Android 13 | Security | 6 | 6 | on server |
G991USQS6EWD5 | May 12, 2023 | Android 13 | Security | 6 | 2 | on server |
G991USQU6EWD3 | May 2, 2023 | Android 13 | Feature | 6 | 2 | on server |
G991USQU6EWD1 | Apr 23, 2023 | Android 13 | Feature | 6 | 6 | on server |
G991USQS5CVIG | Apr 3, 2023 | Android 12 | Security | 5 | 1 | on server |
G991USQS5DVL1 | Apr 3, 2023 | Android 13 | Security | 5 | 1 | on server |
G991USQU5DVK9 | Apr 3, 2023 | Android 13 | Feature | 5 | 1 | on server |
G991USQU4AUGZ | Apr 3, 2023 | Android 11 | Feature | 4 | 1 | on server |
G991USQU5CVCC | Apr 3, 2023 | Android 12 | Feature | 5 | 1 | on server |
G991USQU5CVDL | Apr 3, 2023 | Android 12 | Feature | 5 | 1 | on server |
G991USQU5CVF2 | Apr 3, 2023 | Android 12 | Feature | 5 | 1 | on server |
G991USQU5CVF8 | Apr 3, 2023 | Android 12 | Feature | 5 | 1 | on server |
G991USQU5CVF9 | Apr 3, 2023 | Android 12 | Feature | 5 | 1 | on server |
G991USQU1AUA4 | Apr 3, 2023 | Android 11 | Feature | 1 | 1 | on server |
G991USQU2AUCC | Apr 3, 2023 | Android 11 | Feature | 2 | 1 | on server |
G991USQS6EWCA | Apr 3, 2023 | Android 13 | Security | 6 | 3 | on server |
G991USQS5EWB3 | Mar 9, 2023 | Android 13 | Security | 5 | 7 | on server |
G991USQU5EWAI | Feb 23, 2023 | Android 13 | Feature | 5 | 8 | on server |
G991USQU5DWA8 | Jan 30, 2023 | Android 13 | Feature | 5 | 4 | on server |
G991USQS5DWA5 | Jan 24, 2023 | Android 13 | Security | 5 | 4 | on server |
G991USQU5DVL9 | Jan 9, 2023 | Android 13 | Feature | 5 | 4 | on server |
G991USQS5DVL3 | Dec 18, 2022 | Android 13 | Security | 5 | 3 | on server |
G991USQS5DVK7 | Dec 1, 2022 | Android 13 | Security | 5 | 5 | on server |
G991USQU5DVK3 | Nov 21, 2022 | Android 13 | Feature | 5 | 5 | on server |
G991USQU5CVIF | Oct 10, 2022 | Android 12 | Feature | 5 | 4 | on server |
G991USQS5CVI8 | Sep 28, 2022 | Android 12 | Security | 5 | 3 | on server |
G991USQS5CVHC | Sep 14, 2022 | Android 12 | Security | 5 | 4 | on server |
G991USQS5CVHB | Sep 14, 2022 | Android 12 | Security | 5 | 4 | on server |
G991USQU5CVH9 | Sep 12, 2022 | Android 12 | Feature | 5 | 4 | on server |
G991USQU5CVH8 | Sep 6, 2022 | Android 12 | Feature | 5 | 4 | on server |
G991USQS5CVGA | Aug 9, 2022 | Android 12 | Security | 5 | 3 | on server |
G991USQU5CVGB | Aug 5, 2022 | Android 12 | Feature | 5 | 4 | on server |
G991USQU5CVG9 | Jul 31, 2022 | Android 12 | Feature | 5 | 3 | on server |
G991USQU5CVG4 | Jul 22, 2022 | Android 12 | Feature | 5 | 4 | on server |
G991USQU5CVF1 | Jun 27, 2022 | Android 12 | Feature | 5 | 3 | on server |
G991USQU5CVF3 | Jun 26, 2022 | Android 12 | Feature | 5 | 2 | on server |
G991USQU5CVE8 | May 30, 2022 | Android 12 | Feature | 5 | 1 | on server |
G991USQU5CVDB | May 8, 2022 | Android 12 | Feature | 5 | 8 | on server |
G991USQU5CVCG | Apr 11, 2022 | Android 12 | Feature | 5 | 4 | on server |
G991USQS5CVCB | Apr 6, 2022 | Android 12 | Security | 5 | 3 | on server |
G991USQU5CVC4 | Mar 18, 2022 | Android 12 | Feature | 5 | 7 | on server |
G991USQS5BVA6 | Feb 8, 2022 | Android 12 | Security | 5 | 6 | on server |
G991USQU5BULJ | Jan 16, 2022 | Android 12 | Feature | 5 | 6 | on server |
G991USQS4BUKK | Jan 2, 2022 | Android 12 | Security | 4 | 7 | on server |
G991USQS4BULC | Jan 2, 2022 | Android 12 | Security | 4 | 1 | on server |
G991USQU4BUKF | Nov 30, 2021 | Android 12 | Feature | 4 | 8 | on server |
G991USQU4BUK9 | Nov 22, 2021 | Android 12 | Feature | 4 | 1 | on server |
G991USQU4BUK7 | Nov 15, 2021 | Android 12 | Feature | 4 | 8 | on server |
G991USQS4AUIR | Oct 22, 2021 | Android 11 | Security | 4 | 3 | on server |
G991USQS4AUIN | Oct 13, 2021 | Android 11 | Security | 4 | 4 | on server |
G991USQU4AUIL | Oct 10, 2021 | Android 11 | Feature | 4 | 3 | on server |
G991USQS4AUIG | Oct 3, 2021 | Android 11 | Security | 4 | 1 | on server |
G991USQU4AUI7 | Sep 27, 2021 | Android 11 | Feature | 4 | 3 | on server |
G991USQS4AUI1 | Sep 23, 2021 | Android 11 | Security | 4 | 3 | on server |
G991USQU4AUGQ | Aug 19, 2021 | Android 11 | Feature | 4 | 7 | on server |
G991USQU4AUGE | Aug 3, 2021 | Android 11 | Feature | 4 | 3 | on server |
G991USQU4AUFH | Jul 12, 2021 | Android 11 | Feature | 4 | 1 | on server |
G991USQS4AUFD | Jul 11, 2021 | Android 11 | Security | 4 | 6 | on server |
G991USQU4AUF5 | Jun 21, 2021 | Android 11 | Feature | 4 | 7 | on server |
G991USQU3AUDB | May 16, 2021 | Android 11 | Feature | 3 | 2 | on server |
G991USQU3AUDD | May 13, 2021 | Android 11 | Feature | 3 | 4 | on server |
G991USQU2AUC8 | Apr 4, 2021 | Android 11 | Feature | 2 | 6 | on server |
G991USQU2AUB5 | Mar 3, 2021 | Android 11 | Feature | 2 | 6 | on server |
G991USQU1AUAG | Feb 7, 2021 | Android 11 | Feature | 1 | 6 | on server |
G991USQU1AUA3 | Jan 20, 2021 | Android 11 | Feature | 1 | 5 | on server |
G991USQU1ATLF | Jan 20, 2021 | Android 11 | Feature | 1 | 3 | on server |
G991USQU1ATL9 | Jan 20, 2021 | Android 11 | Feature | 1 | 1 | on server |
G991USQU1ATLI | Jan 14, 2021 | Android 11 | Feature | 1 | 2 | on server |
Beta and test builds
Samsung's servers also list 4 beta build(s) for this model. They are not offered to regular users and are often removed after the next stable release.
| Build | Listed | File |
|---|---|---|
G991USQU4ZUJG | Oct 21, 2021 | pulled |
G991USQU4ZUJ1 | Oct 4, 2021 | pulled |
G991USQU4ZUID | Sep 13, 2021 | pulled |
G991USQU4ZUK1 | – | pulled |
How to download SM-G991U firmware
We do not host firmware. Download it directly from Samsung's servers with a free open-source tool, for example samloader:
samloader download -m SM-G991U -r SPRReplace SPR with your region code. Step-by-step instructions, including a graphical alternative:
How to download Samsung firmware.
Changelog and security patch level
Samsung publishes the release notes for each update, including the security patch level, on its own site. They are listed per region – for example SM-G991U / SPR release notes on doc.samsungmobile.com. Each region page here links to the notes for that code. We don't show the patch level ourselves because Samsung's update servers don't report it (why).