SM-S921U1 firmware for ATT – USA (AT&T)
45 builds for the Galaxy S24 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 |
|---|---|---|---|---|---|
S921U1UES6EZJ1/S921U1OYM6EZJ1/S921U1UES6EZJ1 | Oct 30, 2026 | Android 17 | Security | 6 | on server |
S921U1UEU6EZIF/S921U1OYM6EZIF/S921U1UEU6EZIF | Oct 21, 2026 | Android 17 | Feature | 6 | on server |
S921U1UES6DZI2/S921U1OYM6DZI2/S921U1UES6DZI2 | Oct 1, 2026 | Android 16 | Security | 6 | on server |
S921U1UEU6ZZI4/S921U1OYM6ZZI4/S921U1UEU6EZI4 beta | Sep 15, 2026 | – | Feature | 6 | pulled |
S921U1UEU6ZZHL/S921U1OYM6ZZHL/S921U1UEU6EZHL beta | Sep 3, 2026 | – | Feature | 6 | pulled |
S921U1UES6DZH3/S921U1OYM6DZH3/S921U1UES6DZH3 | Sep 1, 2026 | Android 16 | Security | 6 | on server |
S921U1UES6DZG1/S921U1OYM6DZG1/S921U1UES6DZG1 | Jul 23, 2026 | Android 16 | Security | 6 | on server |
S921U1UES6DZF2/S921U1OYM6DZF2/S921U1UES6DZF2 | Jun 25, 2026 | Android 16 | Security | 6 | on server |
S921U1UES6DZE2/S921U1OYM6DZE2/S921U1UES6DZE2 | Jun 2, 2026 | Android 16 | Security | 6 | on server |
S921U1UEU5DZDR/S921U1OYM5DZDR/S921U1UEU5DZDR | May 18, 2026 | Android 16 | Feature | 5 | on server |
S921U1UEU5ZZDD/S921U1OYM5ZZDD/S921U1UEU5DZDD beta | Apr 21, 2026 | – | Feature | 5 | pulled |
S921U1UES5CZD2/S921U1OYM5CZD2/S921U1UES5CZD2 | Apr 17, 2026 | Android 16 | Security | 5 | on server |
S921U1UEU5ZZD5/S921U1OYM5ZZD5/S921U1UEU5DZD5 beta | Apr 10, 2026 | – | Feature | 5 | pulled |
S921U1UES5CZC1/S921U1OYM5CZC1/S921U1UES5CZC1 | Mar 30, 2026 | Android 16 | Security | 5 | on server |
S921U1UEU5ZZCD/S921U1OYM5ZZCD/S921U1UEU5DZCD beta | Mar 27, 2026 | – | Feature | 5 | pulled |
S921U1UES5CZB2/S921U1OYM5CZB2/S921U1UES5CZB2 | Mar 5, 2026 | Android 16 | Security | 5 | on server |
S921U1UES4CZA1/S921U1OYM4CZA1/S921U1UES4CZA1 | Jan 30, 2026 | Android 16 | Security | 4 | on server |
S921U1UES4CYL1/S921U1OYM4CYL1/S921U1UES4CYL1 | Dec 18, 2025 | Android 16 | Security | 4 | on server |
S921U1UES4CYK2/S921U1OYM4CYK2/S921U1UES4CYK2 | Nov 24, 2025 | Android 16 | Security | 4 | on server |
S921U1UES4CYJ1/S921U1OYM4CYJ1/S921U1UES4CYJ1 | Oct 30, 2025 | Android 16 | Security | 4 | on server |
S921U1UEU4CYI9/S921U1OYM4CYI9/S921U1UEU4CYI9 | Sep 25, 2025 | Android 16 | Feature | 4 | on server |
S921U1UES4BYG2/S921U1OYM4BYG2/S921U1UES4BYG2 | Aug 18, 2025 | Android 15 | Security | 4 | on server |
S921U1UES4BYF5/S921U1OYM4BYF5/S921U1UES4BYF5 | Jul 17, 2025 | Android 15 | Security | 4 | on server |
S921U1UES4BYF2/S921U1OYM4BYF2/S921U1UES4BYF2 | Jun 25, 2025 | Android 15 | Security | 4 | on server |
S921U1UES4BYE4/S921U1OYM4BYE4/S921U1UES4BYE4 | May 21, 2025 | Android 15 | Security | 4 | on server |
S921U1UEU4BYD9/S921U1OYM4BYD9/S921U1UEU4BYD9 | Apr 23, 2025 | Android 15 | Feature | 4 | on server |
S921U1UEU4BYCH/S921U1OYM4BYCH/S921U1UEU4BYCH | Apr 11, 2025 | Android 15 | Feature | 4 | on server |
S921U1UES4AYB3/S921U1OYM4AYB3/S921U1UES4AYB3 | Mar 13, 2025 | Android 14 | Security | 4 | on server |
S921U1UES4AYA1/S921U1OYM4AYA1/S921U1UES4AYA1 | Feb 13, 2025 | Android 14 | Security | 4 | on server |
S921U1UES4AXL4/S921U1OYM4AXL4/S921U1UES4AXL4 | Jan 23, 2025 | Android 14 | Security | 4 | on server |
S921U1UES4AXL2/S921U1OYM4AXL2/S921U1UES4AXL2 | Jan 9, 2025 | Android 14 | Security | 4 | on server |
S921U1UES4AXKF/S921U1OYM4AXKF/S921U1UES4AXKF | Dec 11, 2024 | Android 14 | Security | 4 | on server |
S921U1UEU4AXK4/S921U1OYM4AXK4/S921U1UEU4AXK4 | Nov 27, 2024 | Android 14 | Feature | 4 | on server |
S921U1UES4AXJA/S921U1OYM4AXJA/S921U1UES4AXJA | Nov 4, 2024 | Android 14 | Security | 4 | on server |
S921U1UES3AXI1/S921U1OYM3AXI1/S921U1UES3AXI1 | Oct 10, 2024 | Android 14 | Security | 3 | on server |
S921U1UES3AXHF/S921U1OYM3AXHF/S921U1UES3AXHF | Sep 25, 2024 | Android 14 | Security | 3 | on server |
S921U1UEU3AXH7/S921U1OYM3AXH7/S921U1UEU3AXH7 | Sep 10, 2024 | Android 14 | Feature | 3 | on server |
S921U1UES3AXFJ/S921U1OYM3AXFJ/S921U1UES3AXFJ | Aug 8, 2024 | Android 14 | Security | 3 | on server |
S921U1UES3AXFC/S921U1OYM3AXFC/S921U1UES3AXFC | Jul 15, 2024 | Android 14 | Security | 3 | on server |
S921U1UES2AXE4/S921U1OYM2AXE4/S921U1UES2AXE4 | Jun 11, 2024 | Android 14 | Security | 2 | on server |
S921U1UES2AXD3/S921U1OYM2AXD3/S921U1UES2AXD3 | May 10, 2024 | Android 14 | Security | 2 | on server |
S921U1UEU1AXCB/S921U1OYM1AXCB/S921U1UEU1AXCB | Mar 27, 2024 | Android 14 | Feature | 1 | on server |
S921U1UES1AXBG/S921U1OYM1AXBG/S921U1UES1AXBG | Mar 2, 2024 | Android 14 | Security | 1 | on server |
S921U1UEU1AXB7/S921U1OYM1AXB7/S921U1UEU1AXB7 | Feb 23, 2024 | Android 14 | Feature | 1 | on server |
S921U1UEU1AWM9/S921U1OYM1AWM9/S921U1UEU1AWM9 | Jan 18, 2024 | Android 14 | Feature | 1 | on server |
Download the latest ATT build
samloader download -m SM-S921U1 -r ATT -v S921U1UES6EZJ1/S921U1OYM6EZJ1/S921U1UES6EZJ1See how to download Samsung firmware and how to flash it. Back to the SM-S921U1 overview.