Samsung Galaxy Z Fold6 (SM-F956N) Firmware Overview
What is the latest SM-F956N firmware?
F956NKSU4EZIH, released September 20, 2026 with Android 17. It is a feature update on bootloader binary 4. The archive holds 50 official builds across 4 regions (CSC).
Is the Samsung Galaxy Z Fold6 still getting updates?
Yes. The newest build is from September 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-F956N builds in the archive run Android 16 to 17. The earliest build we have for each version:
- Android 17: F956NKSU4EZIH (Sep 2026), 4 builds in total
- Android 16: F956NKSS2CYJ3 (Oct 2025), 46 builds in total
Can I downgrade the SM-F956N firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. In the archive the binary of this model rose from 2 to 4:
- Binary 4 — since May 2026
- Binary 3 — since Feb 2026
- Binary 2 — since Oct 2025
A phone already on binary 4 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 4 build. How to read a build number.
All SM-F956N firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
F956NKSU4EZIH
Feature update
|
4 | KOO | 17 |
2026-09-20 | Download |
|
F956NKSU4EZIH
Feature update
|
4 | SKC | 17 |
2026-09-20 | Download |
|
F956NKSU4EZIH
Feature update
|
4 | KTC | 17 |
2026-09-20 | Download |
|
F956NKSU4EZIH
Feature update
|
4 | LUC | 17 |
2026-09-20 | Download |
|
F956NKSS4DZH5
Security update
|
4 | KOO | 16 |
2026-08-12 | Download |
|
F956NKSS4DZH5
Security update
|
4 | KTC | 16 |
2026-08-12 | Download |
|
F956NKSS4DZH5
Security update
|
4 | LUC | 16 |
2026-08-12 | Download |
|
F956NKSS4DZH5
Security update
|
4 | SKC | 16 |
2026-08-12 | Download |
|
F956NKSS4DZG1
Security update
|
4 | KOO | 16 |
2026-07-06 | Download |
|
F956NKSS4DZG1
Security update
|
4 | KTC | 16 |
2026-07-06 | Download |
|
F956NKSS4DZG1
Security update
|
4 | LUC | 16 |
2026-07-06 | Download |
|
F956NKSS4DZG1
Security update
|
4 | SKC | 16 |
2026-07-06 | Download |
|
F956NKSS4DZF3
Security update
|
4 | LUC | 16 |
2026-06-10 | Download |
|
F956NKSS4DZF3
Security update
|
4 | KOO | 16 |
2026-06-10 | Download |
|
F956NKSS4DZF3
Security update
|
4 | KTC | 16 |
2026-06-10 | Download |
|
F956NKSS4DZF3
Security update
|
4 | SKC | 16 |
2026-06-10 | Download |
|
F956NKSS4DZE1
Security update
|
4 | KTC | 16 |
2026-05-15 | Download |
|
F956NKSS4DZE1
Security update
|
4 | SKC | 16 |
2026-05-15 | Download |
|
F956NKSS4DZE1
Security update
|
4 | KOO | 16 |
2026-05-15 | Download |
|
F956NKSS4DZE1
Security update
|
4 | LUC | 16 |
2026-05-15 | Download |
|
F956NKSU3DZDP
Feature update
|
3 | SKC | 16 |
2026-05-11 | Download |
|
F956NKSU3DZDP
Feature update
|
3 | KTC | 16 |
2026-05-11 | Download |
|
F956NKSU3DZDP
Feature update
|
3 | LUC | 16 |
2026-05-11 | Download |
|
F956NKSS3CZCS
Security update
|
3 | LUC | 16 |
2026-04-07 | Download |
|
F956NKSS3CZCS
Security update
|
3 | KTC | 16 |
2026-04-07 | Download |
|
F956NKSS3CZCS
Security update
|
3 | SKC | 16 |
2026-04-07 | Download |
|
F956NKSS3CZC1
Security update
|
3 | KTC | 16 |
2026-03-19 | Download |
|
F956NKSS3CZC1
Security update
|
3 | LUC | 16 |
2026-03-19 | Download |
|
F956NKSS3CZC1
Security update
|
3 | SKC | 16 |
2026-03-19 | Download |
|
F956NKSS3CZC1
Security update
|
3 | KOO | 16 |
2026-03-19 | Download |
|
F956NKSS3CZB2
Security update
|
3 | SKC | 16 |
2026-02-23 | Download |
|
F956NKSS3CZB2
Security update
|
3 | LUC | 16 |
2026-02-23 | Download |
|
F956NKSS3CZB2
Security update
|
3 | KTC | 16 |
2026-02-23 | Download |
|
F956NKSS3CZB2
Security update
|
3 | KOO | 16 |
2026-02-23 | Download |
|
F956NKSS2CZA1
Security update
|
2 | SKC | 16 |
2026-01-15 | Download |
|
F956NKSS2CZA1
Security update
|
2 | KTC | 16 |
2026-01-15 | Download |
|
F956NKSS2CZA1
Security update
|
2 | LUC | 16 |
2026-01-15 | Download |
|
F956NKSS2CZA1
Security update
|
2 | KOO | 16 |
2026-01-15 | Download |
|
F956NKSS2CYKE
Security update
|
2 | LUC | 16 |
2025-12-11 | Download |
|
F956NKSS2CYKE
Security update
|
2 | SKC | 16 |
2025-12-11 | Download |
|
F956NKSS2CYKE
Security update
|
2 | KTC | 16 |
2025-12-11 | Download |
|
F956NKSS2CYKE
Security update
|
2 | KOO | 16 |
2025-12-11 | Download |
|
F956NKSS2CYK3
Security update
|
2 | LUC | 16 |
2025-11-17 | Download |
|
F956NKSS2CYK3
Security update
|
2 | KTC | 16 |
2025-11-17 | Download |
|
F956NKSS2CYK3
Security update
|
2 | SKC | 16 |
2025-11-17 | Download |
|
F956NKSS2CYK3
Security update
|
2 | KOO | 16 |
2025-11-17 | Download |
|
F956NKSS2CYJ3
Security update
|
2 | SKC | 16 |
2025-10-30 | Download |
|
F956NKSS2CYJ3
Security update
|
2 | KTC | 16 |
2025-10-30 | Download |
|
F956NKSS2CYJ3
Security update
|
2 | KOO | 16 |
2025-10-30 | Download |
|
F956NKSS2CYJ3
Security update
|
2 | LUC | 16 |
2025-10-30 | Download |
Latest SM-F956N 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 | F956NKSU4EZIH | 4 | 17 | 2026-09-20 |
| KTC | F956NKSU4EZIH | 4 | 17 | 2026-09-20 |
| LUC | F956NKSU4EZIH | 4 | 17 | 2026-09-20 |
| SKC | F956NKSU4EZIH | 4 | 17 | 2026-09-20 |
How to Flash SM-F956N Firmware
Put the Samsung Galaxy Z Fold6 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 4 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.