Samsung Galaxy S26 Ultra (SM-S948C) Firmware Overview
What is the latest SM-S948C firmware?
S948CONU1BZI9, released September 14, 2026 with Android 17. It is a feature update on bootloader binary 1. The archive holds 14 official builds across 2 regions (CSC). Each one is the full stock ROM (flash file) for Odin, not an OTA patch.
Is the Samsung Galaxy S26 Ultra still getting updates?
Yes. The newest build is from September 2026, and 2 of 2 regions already have a build from that month; the rest usually follow within a few weeks.
Which Android versions did it get?
The SM-S948C builds in the archive run Android 16 to 17. The earliest build we have for each version:
- Android 17: S948CONU1BZI9 (Sep 2026), 2 builds in total
- Android 16: S948CONU1AZAI (Jan 2026), 11 builds in total
Can I downgrade the SM-S948C firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. All decodable builds in the archive share binary 1:
- Binary 1 — since Jan 2026
All SM-S948C firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
S948CONU1BZI9
Feature update
|
1 | SJP | 17 |
2026-09-14 | Download |
|
S948CONU1BZI9
Feature update
|
1 | RKT | 17 |
2026-09-14 | Download |
|
S948CONS1AZHL
Security update
|
1 | RKT | 16 |
2026-08-26 | Download |
|
S948CONS1AZHL
Security update
|
1 | SJP | 16 |
2026-08-26 | Download |
|
S948CONS1AZF2
Security update
|
1 | SJP | 16 |
2026-06-12 | Download |
|
S948CONS1AZF2
Security update
|
1 | RKT | 16 |
2026-06-12 | Download |
|
S948CONU1AZDE
Feature update
|
1 | SJP | 16 |
2026-04-23 | Download |
|
S948CONS1AZCL
Security update
|
1 | SJP | 16 |
2026-03-26 | Download |
|
S948CONS1AZCL
Security update
|
1 | RKT | 16 |
2026-03-26 | Download |
|
S948CONU1AZCF
Feature update
|
1 | SJP | 16 |
2026-03-16 | Download |
|
S948CONU1AZCF
Feature update
|
1 | RKT | 16 |
2026-03-16 | Download |
|
S948CONU1AZAI
Feature update
|
1 | SJP | 16 |
2026-01-22 | Download |
|
S948CONU1AZAI
Feature update
|
1 | RKT | 16 |
2026-01-22 | Download |
|
S948CONU1AZDE
Feature update
|
1 | RKT | — |
N/A | Download |
Latest SM-S948C 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 |
|---|---|---|---|---|
| RKT | S948CONU1BZI9 | 1 | 17 | 2026-09-14 |
| SJP | S948CONU1BZI9 | 1 | 17 | 2026-09-14 |
How to Flash SM-S948C Firmware
Put the Samsung Galaxy S26 Ultra 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 1 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.