SM-G991U firmware for ATT – USA (AT&T)
65 builds for the Galaxy S21 5G in region ATT. The full version string is
PDA/CSC/MODEM – you need it to download a specific build.
| Version (PDA/CSC/MODEM) | Released | Android | Type | Bit | File |
|---|---|---|---|---|---|
G991USQSJHZB1/G991UOYNJHZB1/G991USQSJHZB1 | Mar 17, 2026 | Android 15 | Security | 19 | on server |
G991USQSJHZAA/G991UOYNJHZAA/G991USQSJHZAA | Feb 1, 2026 | Android 15 | Security | 19 | on server |
G991USQSIHYL1/G991UOYNIHYL1/G991USQSIHYL1 | Dec 17, 2025 | Android 15 | Security | 18 | on server |
G991USQSHHYI1/G991UOYNHHYI1/G991USQSHHYI1 | Sep 24, 2025 | Android 15 | Security | 17 | on server |
G991USQSGHYF2/G991UOYNGHYF2/G991USQSGHYF2 | Jun 25, 2025 | Android 15 | Security | 16 | on server |
G991USQSFHYE2/G991UOYNFHYE2/G991USQSFHYE2 | Jun 8, 2025 | Android 15 | Security | 15 | on server |
G991USQUEHYDA/G991UOYNEHYDA/G991USQUEHYDA | May 12, 2025 | Android 15 | Feature | 14 | on server |
G991USQSEGYA5/G991UOYNEGYA5/G991USQSEGYA5 | Feb 24, 2025 | Android 14 | Security | 14 | on server |
G991USQSEGXLB/G991UOYNEGXLB/G991USQSEGXLB | Jan 12, 2025 | Android 14 | Security | 14 | on server |
G991USQSEGXK3/G991UOYNEGXK3/G991USQSEGXK3 | Dec 13, 2024 | Android 14 | Security | 14 | on server |
G991USQSEGXJ4/G991UOYNEGXJ4/G991USQSEGXJ4 | Nov 13, 2024 | Android 14 | Security | 14 | on server |
G991USQSDGXJ2/G991UOYNDGXJ2/G991USQSDGXJ2 | Oct 15, 2024 | Android 14 | Security | 13 | on server |
G991USQSCGXH2/G991UOYNCGXH2/G991USQSCGXH2 | Sep 12, 2024 | Android 14 | Security | 12 | on server |
G991USQUCGXGA/G991UOYNCGXGA/G991USQUCGXGA | Aug 12, 2024 | Android 14 | Feature | 12 | on server |
G991USQSCGXF3/G991UOYNCGXF3/G991USQSCGXF3 | Jul 11, 2024 | Android 14 | Security | 12 | on server |
G991USQSBGXF1/G991UOYNBGXF1/G991USQSBGXF1 | Jun 11, 2024 | Android 14 | Security | 11 | on server |
G991USQSBGXE2/G991UOYNBGXE2/G991USQSBGXE2 | May 20, 2024 | Android 14 | Security | 11 | on server |
G991USQUAGXDE/G991UOYNAGXDE/G991USQUAGXDE | May 11, 2024 | Android 14 | Feature | 10 | on server |
G991USQSAFXD4/G991UOYNAFXD4/G991USQSAFXD4 | Apr 14, 2024 | Android 14 | Security | 10 | on server |
G991USQSAFXC4/G991UOYNAFXC4/G991USQSAFXC4 | Mar 17, 2024 | Android 14 | Security | 10 | on server |
G991USQSAFXAG/G991UOYNAFXAG/G991USQSAFXAG | Feb 15, 2024 | Android 14 | Security | 10 | on server |
G991USQS9FXA1/G991UOYN9FXA1/G991USQS9FXA1 | Jan 17, 2024 | Android 14 | Security | 9 | on server |
G991USQU9FWKC/G991UOYN9FWKC/G991USQU9FWKC | Dec 12, 2023 | Android 14 | Feature | 9 | on server |
G991USQS9EWK1/G991UOYN9EWK1/G991USQS9EWK1 | Nov 16, 2023 | Android 13 | Security | 9 | on server |
G991USQS9EWI2/G991UOYN9EWI2/G991USQS9EWI2 | Oct 10, 2023 | Android 13 | Security | 9 | on server |
G991USQS9EWI1/G991UOYN9EWI1/G991USQS9EWI1 | Sep 26, 2023 | Android 13 | Security | 9 | on server |
G991USQU8EWH6/G991UOYN8EWH6/G991USQU8EWH6 | Sep 6, 2023 | Android 13 | Feature | 8 | on server |
G991USQS8EWH1/G991UOYN8EWH1/G991USQS8EWH1 | Aug 16, 2023 | Android 13 | Security | 8 | on server |
G991USQS8EWF1/G991UOYN8EWF1/G991USQS8EWF1 | Jul 16, 2023 | Android 13 | Security | 8 | on server |
G991USQU7EWE5/G991UOYN7EWE5/G991USQU7EWE5 | Jun 16, 2023 | Android 13 | Feature | 7 | on server |
G991USQS6EWD4/G991UOYN6EWD4/G991USQS6EWD4 | May 14, 2023 | Android 13 | Security | 6 | on server |
G991USQU6EWD1/G991UOYN6EWD1/G991USQU6EWD1 | Apr 25, 2023 | Android 13 | Feature | 6 | on server |
G991USQS5CVHB/G991UOYN5CVHB/G991USQS5CVHB | Apr 3, 2023 | Android 12 | Security | 5 | on server |
G991USQS5CVIG/G991UOYN5CVIG/G991USQS5CVIG | Apr 3, 2023 | Android 12 | Security | 5 | on server |
G991USQS5DVL1/G991UOYN5DVL1/G991USQS5DVL1 | Apr 3, 2023 | Android 13 | Security | 5 | on server |
G991USQU5DVK9/G991UOYN5DVK9/G991USQU5DVK9 | Apr 3, 2023 | Android 13 | Feature | 5 | on server |
G991USQU5DWA8/G991UOYN5DWA8/G991USQU5DWA8 | Apr 3, 2023 | Android 13 | Feature | 5 | on server |
G991USQS4AUFD/G991UOYN4AUFD/G991USQS4AUFD | Apr 3, 2023 | Android 11 | Security | 4 | on server |
G991USQS4AUIN/G991UOYN4AUIN/G991USQS4AUIN | Apr 3, 2023 | Android 11 | Security | 4 | on server |
G991USQS4BUKK/G991UOYN4BUKK/G991USQS4BUKK | Apr 3, 2023 | Android 12 | Security | 4 | on server |
G991USQS5BVA6/G991UOYN5BVA6/G991USQS5BVA6 | Apr 3, 2023 | Android 12 | Security | 5 | on server |
G991USQU4AUGQ/G991UOYN4AUGQ/G991USQU4AUGQ | Apr 3, 2023 | Android 11 | Feature | 4 | on server |
G991USQU4AUGZ/G991UOYN4AUGZ/G991USQU4AUGZ | Apr 3, 2023 | Android 11 | Feature | 4 | on server |
G991USQU4AUI7/G991UOYN4AUI7/G991USQU4AUI7 | Apr 3, 2023 | Android 11 | Feature | 4 | on server |
G991USQU4BUK7/G991UOYN4BUK7/G991USQU4BUK7 | Apr 3, 2023 | Android 12 | Feature | 4 | on server |
G991USQU4BUKF/G991UOYN4BUKF/G991USQU4BUKF | Apr 3, 2023 | Android 12 | Feature | 4 | on server |
G991USQU5BULJ/G991UOYN5BULJ/G991USQU5BULJ | Apr 3, 2023 | Android 12 | Feature | 5 | on server |
G991USQU5CVCC/G991UOYN5CVCC/G991USQU5CVCC | Apr 3, 2023 | Android 12 | Feature | 5 | on server |
G991USQU5CVDB/G991UOYN5CVDB/G991USQU5CVDB | Apr 3, 2023 | Android 12 | Feature | 5 | on server |
G991USQU5CVDL/G991UOYN5CVDL/G991USQU5CVDL | Apr 3, 2023 | Android 12 | Feature | 5 | on server |
G991USQU5CVF2/G991UOYN5CVF2/G991USQU5CVF2 | Apr 3, 2023 | Android 12 | Feature | 5 | on server |
G991USQU5CVF8/G991UOYN5CVF8/G991USQU5CVF8 | Apr 3, 2023 | Android 12 | Feature | 5 | on server |
G991USQU5CVF9/G991UOYN5CVF9/G991USQU5CVF9 | Apr 3, 2023 | Android 12 | Feature | 5 | on server |
G991USQU5CVH8/G991UOYN5CVH8/G991USQU5CVH8 | Apr 3, 2023 | Android 12 | Feature | 5 | on server |
G991USQU1ATLF/G991UOYN1ATLF/G991USQU1ATLF | Apr 3, 2023 | Android 11 | Feature | 1 | on server |
G991USQU1AUA4/G991UOYN1AUA4/G991USQU1AUA4 | Apr 3, 2023 | Android 11 | Feature | 1 | on server |
G991USQU1AUAG/G991UOYN1AUAG/G991USQU1AUAG | Apr 3, 2023 | Android 11 | Feature | 1 | on server |
G991USQU2AUB5/G991UOYN2AUB5/G991USQU2AUB5 | Apr 3, 2023 | Android 11 | Feature | 2 | on server |
G991USQU2AUC8/G991UOYN2AUC8/G991USQU2AUC8 | Apr 3, 2023 | Android 11 | Feature | 2 | on server |
G991USQU2AUCC/G991UOYN2AUCC/G991USQU2AUCC | Apr 3, 2023 | Android 11 | Feature | 2 | on server |
G991USQU3AUDB/G991UOYN3AUDB/G991USQU3AUDB | Apr 3, 2023 | Android 11 | Feature | 3 | on server |
G991USQS6EWCA/G991UOYN6EWCA/G991USQS6EWCA | Apr 3, 2023 | Android 13 | Security | 6 | on server |
G991USQS5EWB3/G991UOYN5EWB3/G991USQS5EWB3 | Mar 9, 2023 | Android 13 | Security | 5 | on server |
G991USQU5EWAI/G991UOYN5EWAI/G991USQU5EWAI | Feb 23, 2023 | Android 13 | Feature | 5 | on server |
G991USQU4AUF5/G991UOYN4AUF5/G991USQU4AUF5 | Jun 24, 2021 | Android 11 | Feature | 4 | on server |
Download the latest ATT build
samloader download -m SM-G991U -r ATT -v G991USQSJHZB1/G991UOYNJHZB1/G991USQSJHZB1Changelog and security patch level
Samsung's official release notes for SM-G991U in ATT, including the security patch level of each update: doc.samsungmobile.com/SM-G991U/ATT. We don't show the patch level ourselves (why).
See how to download Samsung firmware and
how to flash it. Back to the SM-G991U overview.
All models with ATT: Samsung CSC ATT.