Samsung Galaxy S24 (SM-S921U1) Firmware Overview
What is the latest SM-S921U1 firmware?
S921U1UEU6EZIF, released September 25, 2026 with Android 17. It is a feature update on bootloader binary 6. The archive holds 79 official builds across 21 regions (CSC).
Is the Samsung Galaxy S24 still getting updates?
Yes. The newest build is from September 2026, and 21 of 21 regions already have a build from that month; the rest usually follow within a few weeks.
Which Android versions did it get?
The SM-S921U1 builds in the archive run Android 16 to 17. The earliest build we have for each version:
- Android 17: S921U1UEU6EZIF (Sep 2026), 19 builds in total
- Android 16: S921U1UES6DZF2 (Jun 2026), 60 builds in total
Can I downgrade the SM-S921U1 firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. All decodable builds in the archive share binary 6:
- Binary 6 — since Jun 2026
All SM-S921U1 firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
S921U1UEU6EZIF
Feature update
|
6 | DSG | 17 |
2026-09-25 | Download |
|
S921U1UEU6EZIF
Feature update
|
6 | XAA | 17 |
2026-09-25 | Download |
|
S921U1UEU6EZIF
Feature update
|
6 | AIO | 17 |
2026-09-25 | Download |
|
S921U1UEU6EZIF
Feature update
|
6 | ACG | 17 |
2026-09-25 | Download |
|
S921U1UEU6EZIF
Feature update
|
6 | ATC | 17 |
2026-09-25 | Download |
|
S921U1UEU6EZIF
Feature update
|
6 | ATT | 17 |
2026-09-25 | Download |
|
S921U1UEU6EZIF
Feature update
|
6 | CHA | 17 |
2026-09-25 | Download |
|
S921U1UEU6EZIF
Feature update
|
6 | DSH | 17 |
2026-09-25 | Download |
|
S921U1UEU6EZIF
Feature update
|
6 | CCT | 17 |
2026-09-25 | Download |
|
S921U1UEU6EZIF
Feature update
|
6 | DSA | 17 |
2026-09-25 | Download |
|
S921U1UEU6EZIF
Feature update
|
6 | LRA | 17 |
2026-09-25 | Download |
|
S921U1UEU6EZIF
Feature update
|
6 | FKR | 17 |
2026-09-25 | Download |
|
S921U1UEU6EZIF
Feature update
|
6 | TFN | 17 |
2026-09-25 | Download |
|
S921U1UEU6EZIF
Feature update
|
6 | TMB | 17 |
2026-09-25 | Download |
|
S921U1UEU6EZIF
Feature update
|
6 | USC | 17 |
2026-09-25 | Download |
|
S921U1UEU6EZIF
Feature update
|
6 | TMK | 17 |
2026-09-25 | Download |
|
S921U1UEU6EZIF
Feature update
|
6 | VZW | 17 |
2026-09-25 | Download |
|
S921U1UEU6EZIF
Feature update
|
6 | XAG | 17 |
2026-09-25 | Download |
|
S921U1UEU6EZIF
Feature update
|
6 | XAR | 17 |
2026-09-25 | Download |
|
S921U1UES6DZI2
Security update
|
6 | PCT | 16 |
2026-09-24 | Download |
|
S921U1UES6DZI2
Security update
|
6 | LLA | 16 |
2026-09-24 | Download |
|
S921U1UES6DZI2
Security update
|
6 | AIO | 16 |
2026-09-23 | Download |
|
S921U1UES6DZI2
Security update
|
6 | ACG | 16 |
2026-09-23 | Download |
|
S921U1UES6DZI2
Security update
|
6 | ATC | 16 |
2026-09-23 | Download |
|
S921U1UES6DZI2
Security update
|
6 | ATT | 16 |
2026-09-23 | Download |
|
S921U1UES6DZI2
Security update
|
6 | CCT | 16 |
2026-09-23 | Download |
|
S921U1UES6DZI2
Security update
|
6 | CHA | 16 |
2026-09-23 | Download |
|
S921U1UES6DZI2
Security update
|
6 | DSH | 16 |
2026-09-23 | Download |
|
S921U1UES6DZI2
Security update
|
6 | LRA | 16 |
2026-09-23 | Download |
|
S921U1UES6DZI2
Security update
|
6 | DSA | 16 |
2026-09-23 | Download |
|
S921U1UES6DZI2
Security update
|
6 | FKR | 16 |
2026-09-23 | Download |
|
S921U1UES6DZI2
Security update
|
6 | TMB | 16 |
2026-09-23 | Download |
|
S921U1UES6DZI2
Security update
|
6 | USC | 16 |
2026-09-23 | Download |
|
S921U1UES6DZI2
Security update
|
6 | TMK | 16 |
2026-09-23 | Download |
|
S921U1UES6DZI2
Security update
|
6 | VZW | 16 |
2026-09-23 | Download |
|
S921U1UES6DZI2
Security update
|
6 | TFN | 16 |
2026-09-23 | Download |
|
S921U1UES6DZI2
Security update
|
6 | XAA | 16 |
2026-09-23 | Download |
|
S921U1UES6DZI2
Security update
|
6 | XAG | 16 |
2026-09-23 | Download |
|
S921U1UES6DZI2
Security update
|
6 | XAR | 16 |
2026-09-23 | Download |
|
S921U1UES6DZH3
Security update
|
6 | XAA | 16 |
2026-08-17 | Download |
|
S921U1UES6DZH3
Security update
|
6 | TMK | 16 |
2026-08-17 | Download |
|
S921U1UES6DZH3
Security update
|
6 | USC | 16 |
2026-08-17 | Download |
|
S921U1UES6DZH3
Security update
|
6 | TMB | 16 |
2026-08-17 | Download |
|
S921U1UES6DZH3
Security update
|
6 | VZW | 16 |
2026-08-17 | Download |
|
S921U1UES6DZH3
Security update
|
6 | XAG | 16 |
2026-08-17 | Download |
|
S921U1UES6DZH3
Security update
|
6 | DSG | 16 |
2026-08-17 | Download |
|
S921U1UES6DZH3
Security update
|
6 | XAR | 16 |
2026-08-17 | Download |
|
S921U1UES6DZH3
Security update
|
6 | TFN | 16 |
2026-08-17 | Download |
|
S921U1UES6DZH3
Security update
|
6 | FKR | 16 |
2026-08-17 | Download |
|
S921U1UES6DZH3
Security update
|
6 | ACG | 16 |
2026-08-17 | Download |
|
S921U1UES6DZH3
Security update
|
6 | ATC | 16 |
2026-08-17 | Download |
|
S921U1UES6DZH3
Security update
|
6 | AIO | 16 |
2026-08-17 | Download |
|
S921U1UES6DZH3
Security update
|
6 | ATT | 16 |
2026-08-17 | Download |
|
S921U1UES6DZH3
Security update
|
6 | CHA | 16 |
2026-08-17 | Download |
|
S921U1UES6DZH3
Security update
|
6 | DSA | 16 |
2026-08-17 | Download |
|
S921U1UES6DZH3
Security update
|
6 | CCT | 16 |
2026-08-17 | Download |
|
S921U1UES6DZH3
Security update
|
6 | DSH | 16 |
2026-08-17 | Download |
|
S921U1UES6DZH3
Security update
|
6 | LRA | 16 |
2026-08-17 | Download |
|
S921U1UES6DZH3
Security update
|
6 | LLA | 16 |
2026-08-14 | Download |
|
S921U1UES6DZG1
Security update
|
6 | XAA | 16 |
2026-07-07 | Download |
|
S921U1UES6DZG1
Security update
|
6 | XAG | 16 |
2026-07-07 | Download |
|
S921U1UES6DZG1
Security update
|
6 | VZW | 16 |
2026-07-07 | Download |
|
S921U1UES6DZG1
Security update
|
6 | TMK | 16 |
2026-07-07 | Download |
|
S921U1UES6DZG1
Security update
|
6 | TMB | 16 |
2026-07-07 | Download |
|
S921U1UES6DZG1
Security update
|
6 | USC | 16 |
2026-07-07 | Download |
|
S921U1UES6DZG1
Security update
|
6 | XAR | 16 |
2026-07-07 | Download |
|
S921U1UES6DZG1
Security update
|
6 | DSG | 16 |
2026-07-07 | Download |
|
S921U1UES6DZG1
Security update
|
6 | TFN | 16 |
2026-07-07 | Download |
|
S921U1UES6DZG1
Security update
|
6 | AIO | 16 |
2026-07-07 | Download |
|
S921U1UES6DZG1
Security update
|
6 | FKR | 16 |
2026-07-07 | Download |
|
S921U1UES6DZG1
Security update
|
6 | ATT | 16 |
2026-07-07 | Download |
|
S921U1UES6DZG1
Security update
|
6 | CCT | 16 |
2026-07-07 | Download |
|
S921U1UES6DZG1
Security update
|
6 | ATC | 16 |
2026-07-07 | Download |
|
S921U1UES6DZG1
Security update
|
6 | ACG | 16 |
2026-07-07 | Download |
|
S921U1UES6DZG1
Security update
|
6 | CHA | 16 |
2026-07-07 | Download |
|
S921U1UES6DZG1
Security update
|
6 | DSA | 16 |
2026-07-07 | Download |
|
S921U1UES6DZG1
Security update
|
6 | DSH | 16 |
2026-07-07 | Download |
|
S921U1UES6DZG1
Security update
|
6 | LRA | 16 |
2026-07-07 | Download |
|
S921U1UES6DZF2
Security update
|
6 | LLA | 16 |
2026-06-13 | Download |
Latest SM-S921U1 Firmware by Region
The newest build for each region (CSC) code. Not sure which region your phone uses? See the CSC code guide.
| Region | Latest build | Bit | Android | Date |
|---|---|---|---|---|
| ACG | S921U1UEU6EZIF | 6 | 17 | 2026-09-25 |
| AIO | S921U1UEU6EZIF | 6 | 17 | 2026-09-25 |
| ATC | S921U1UEU6EZIF | 6 | 17 | 2026-09-25 |
| ATT | S921U1UEU6EZIF | 6 | 17 | 2026-09-25 |
| CCT | S921U1UEU6EZIF | 6 | 17 | 2026-09-25 |
| CHA | S921U1UEU6EZIF | 6 | 17 | 2026-09-25 |
| DSA | S921U1UEU6EZIF | 6 | 17 | 2026-09-25 |
| DSG | S921U1UEU6EZIF | 6 | 17 | 2026-09-25 |
| DSH | S921U1UEU6EZIF | 6 | 17 | 2026-09-25 |
| FKR | S921U1UEU6EZIF | 6 | 17 | 2026-09-25 |
| LLA | S921U1UES6DZI2 | 6 | 16 | 2026-09-24 |
| LRA | S921U1UEU6EZIF | 6 | 17 | 2026-09-25 |
| PCT | S921U1UES6DZI2 | 6 | 16 | 2026-09-24 |
| TFN | S921U1UEU6EZIF | 6 | 17 | 2026-09-25 |
| TMB | S921U1UEU6EZIF | 6 | 17 | 2026-09-25 |
| TMK | S921U1UEU6EZIF | 6 | 17 | 2026-09-25 |
| USC | S921U1UEU6EZIF | 6 | 17 | 2026-09-25 |
| VZW | S921U1UEU6EZIF | 6 | 17 | 2026-09-25 |
| XAA | S921U1UEU6EZIF | 6 | 17 | 2026-09-25 |
| XAG | S921U1UEU6EZIF | 6 | 17 | 2026-09-25 |
| XAR | S921U1UEU6EZIF | 6 | 17 | 2026-09-25 |
How to Flash SM-S921U1 Firmware
Put the Samsung Galaxy S24 into Download Mode, load the BL, AP, CP and CSC files into Odin on a Windows PC and press Start. Pick a build with Bit 6 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.