Samsung Galaxy S25 (SM-S931N) Firmware Overview
What is the latest SM-S931N firmware?
S931NKSSDDZJ2, released October 7, 2026 with Android 17. It is a security update on bootloader binary 13. The archive holds 24 official builds across 4 regions (CSC). Each one is the full stock ROM (flash file) for Odin, not an OTA patch.
Is the Samsung Galaxy S25 still getting updates?
Yes. The newest build is from October 2026, and 4 of 4 regions already have a build from that month; the rest usually follow within a few weeks.
Which Android versions did it get?
The SM-S931N builds in the archive run Android 16 to 17. The earliest build we have for each version:
- Android 17: S931NKSUCDZIF (Sep 2026), 8 builds in total
- Android 16: S931NKSSACZE1 (May 2026), 16 builds in total
Can I downgrade the SM-S931N firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. In the archive the binary of this model rose from 10 to 13:
- Binary 13 — since Oct 2026
- Binary 12 — since Aug 2026
- Binary 11 — since Jul 2026
- Binary 10 — since May 2026
A phone already on binary 13 rejects builds with a lower binary in Odin ("SW REV CHECK FAIL"), so it can go back to an earlier Android version only if that version has a binary 13 build. How to read a build number.
All SM-S931N firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
S931NKSSDDZJ2
Security update
|
13 | KOO | 17 |
2026-10-07 | Download |
|
S931NKSSDDZJ2
Security update
|
13 | LUC | 17 |
2026-10-07 | Download |
|
S931NKSSDDZJ2
Security update
|
13 | SKC | 17 |
2026-10-07 | Download |
|
S931NKSSDDZJ2
Security update
|
13 | KTC | 17 |
2026-10-07 | Download |
|
S931NKSUCDZIF
Feature update
|
12 | KTC | 17 |
2026-09-20 | Download |
|
S931NKSUCDZIF
Feature update
|
12 | KOO | 17 |
2026-09-20 | Download |
|
S931NKSUCDZIF
Feature update
|
12 | SKC | 17 |
2026-09-20 | Download |
|
S931NKSUCDZIF
Feature update
|
12 | LUC | 17 |
2026-09-20 | Download |
|
S931NKSSCCZH2
Security update
|
12 | LUC | 16 |
2026-08-11 | Download |
|
S931NKSSCCZH2
Security update
|
12 | KOO | 16 |
2026-08-11 | Download |
|
S931NKSSCCZH2
Security update
|
12 | KTC | 16 |
2026-08-11 | Download |
|
S931NKSSCCZH2
Security update
|
12 | SKC | 16 |
2026-08-11 | Download |
|
S931NKSSBCZG3
Security update
|
11 | SKC | 16 |
2026-07-02 | Download |
|
S931NKSSBCZG3
Security update
|
11 | KOO | 16 |
2026-07-02 | Download |
|
S931NKSSBCZG3
Security update
|
11 | KTC | 16 |
2026-07-02 | Download |
|
S931NKSSBCZG3
Security update
|
11 | LUC | 16 |
2026-07-02 | Download |
|
S931NKSUACZF1
Feature update
|
10 | KTC | 16 |
2026-06-02 | Download |
|
S931NKSUACZF1
Feature update
|
10 | SKC | 16 |
2026-06-02 | Download |
|
S931NKSUACZF1
Feature update
|
10 | LUC | 16 |
2026-06-02 | Download |
|
S931NKSUACZF1
Feature update
|
10 | KOO | 16 |
2026-06-02 | Download |
|
S931NKSSACZE1
Security update
|
10 | LUC | 16 |
2026-05-11 | Download |
|
S931NKSSACZE1
Security update
|
10 | KTC | 16 |
2026-05-11 | Download |
|
S931NKSSACZE1
Security update
|
10 | KOO | 16 |
2026-05-11 | Download |
|
S931NKSSACZE1
Security update
|
10 | SKC | 16 |
2026-05-11 | Download |
Latest SM-S931N 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 |
|---|---|---|---|---|
| KOO | S931NKSSDDZJ2 | 13 | 17 | 2026-10-07 |
| KTC | S931NKSSDDZJ2 | 13 | 17 | 2026-10-07 |
| LUC | S931NKSSDDZJ2 | 13 | 17 | 2026-10-07 |
| SKC | S931NKSSDDZJ2 | 13 | 17 | 2026-10-07 |
How to Flash SM-S931N Firmware
Put the Samsung Galaxy S25 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 13 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.