Samsung Galaxy S8+ (SM-G955N) Firmware Overview
What is the latest SM-G955N firmware?
G955NKSU5DZE1, released May 12, 2026 with Android 9. It is a feature update on bootloader binary 5. The archive holds 20 official builds across 3 regions (CSC). Each one is the full stock ROM (flash file) for Odin, not an OTA patch.
Is the Samsung Galaxy S8+ still getting updates?
Yes. The newest build is from May 2026, and 3 of 3 regions already have a build from that month; the rest usually follow within a few weeks.
Can I downgrade the SM-G955N firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. In the archive the binary of this model rose from 1 to 5:
- Binary 5 — since Jul 2020
- Binary 4 — since Feb 2020
- Binary 3 — since Sep 2018
- Binary 2 — since Jun 2018
- Binary 1 — since Apr 2017
A phone already on binary 5 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 5 build. How to read a build number.
All SM-G955N firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
G955NKSU5DZE1
Feature update
|
5 | SKC | 9 |
2026-05-12 | Download |
|
G955NKSU5DZE1
Feature update
|
5 | KTC | 9 |
2026-05-12 | Download |
|
G955NKSU5DZE1
Feature update
|
5 | LUC | 9 |
2026-05-12 | Download |
|
G955NKSU5DVG2
Feature update
|
5 | KTC | 9 |
2022-08-18 | Download |
|
G955NKSU5DVG2
Feature update
|
5 | SKC | 9 |
2022-08-18 | Download |
|
G955NKSU5DVG2
Feature update
|
5 | LUC | 9 |
2022-08-18 | Download |
|
G955NKSU5DUD1
Feature update
|
5 | KTC | 9 |
2021-04-15 | Download |
|
G955NKSU5DUD1
Feature update
|
5 | LUC | 9 |
2021-04-15 | Download |
|
G955NKSU5DUD1
Feature update
|
5 | SKC | 9 |
2021-04-15 | Download |
|
G955NKSU5DUA2
Feature update
|
5 | LUC | 9 |
2021-01-21 | Download |
|
G955NKSU5DUA2
Feature update
|
5 | SKC | 9 |
2021-01-21 | Download |
|
G955NKSU5DTJ2
Feature update
|
5 | SKC | 9 |
2020-11-02 | Download |
|
G955NKSU5DTG1
Feature update
|
5 | KTC | 9 |
2020-07-03 | Download |
|
G955NKSU5DTG1
Feature update
|
5 | LUC | 9 |
2020-07-03 | Download |
|
G955NKSU5DTG1
Feature update
|
5 | SKC | 9 |
2020-07-03 | Download |
|
G955NKSU4DTD1
Feature update
|
4 | KTC | 9 |
2020-04-06 | Download |
|
G955NKSU4DTD1
Feature update
|
4 | LUC | 9 |
2020-04-06 | Download |
|
G955NKSU4DTD1
Feature update
|
4 | SKC | 9 |
2020-04-06 | Download |
|
G955NKSU4DTB2
Feature update
|
4 | SKC | 9 |
2020-02-10 | Download |
|
G955NKSU4DTB2
Feature update
|
4 | KTC | 9 |
2020-02-10 | Download |
Latest SM-G955N 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 |
|---|---|---|---|---|
| KTC | G955NKSU5DZE1 | 5 | 9 | 2026-05-12 |
| LUC | G955NKSU5DZE1 | 5 | 9 | 2026-05-12 |
| SKC | G955NKSU5DZE1 | 5 | 9 | 2026-05-12 |
Older SM-G955N Builds (Archive)
15 earlier builds from the samdb.org catalogue. They are not in the download list above; the link searches for the build on the partner site.
| Build / PDA | Bit | Month | Regions (CSC) | |
|---|---|---|---|---|
| G955NKSU3CRJ1 | 3 | Oct 2018 | KTC, LUC, SKC | Find |
| G955NKSU3CRI3 | 3 | Sep 2018 | KTC, LUC, SKC | Find |
| G955NKSU2CRF5 | 2 | Jun 2018 | KTC, LUC, SKC | Find |
| G955NKSU1CRD7 | 1 | Apr 2018 | KTC, LUC, SKC | Find |
| G955NKSU1CRCB | 1 | Mar 2018 | KTC, LUC, SKC | Find |
| G955NKSU1CRB7 | 1 | Feb 2018 | KTC, LUC, SKC | Find |
| G955NKSU1AQL3 | 1 | Dec 2017 | KTC, LUC, SKC | Find |
| G955NKSU1AQJ5 | 1 | Oct 2017 | KTC, LUC, SKC | Find |
| G955NKSU1AQI1 | 1 | Sep 2017 | KTC, LUC, SKC | Find |
| G955NKSU1AQH2 | 1 | Aug 2017 | KTC, SKC | Find |
| G955NKSU1AQG7 | 1 | Jul 2017 | KTC, LUC, SKC | Find |
| G955NKSU1AQF7 | 1 | Jun 2017 | KTC, LUC, SKC | Find |
| G955NKSU1AQEB | 1 | May 2017 | KTC, LUC, SKC | Find |
| G955NKSU1AQDG | 1 | Apr 2017 | KTC, LUC, SKC | Find |
| G955NKSU1AQDC | 1 | Apr 2017 | KTC, LUC, SKC | Find |
How to Flash SM-G955N Firmware
Put the Samsung Galaxy S8+ 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 5 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.