Samsung Galaxy S26 Ultra (SM-S948W) Firmware Overview
What is the latest SM-S948W firmware?
S948WVLS4BZIG, released September 29, 2026 with Android 17. It is a security update on bootloader binary 4. The archive holds 20 official builds across 17 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 17 of 17 regions already have a build from that month; the rest usually follow within a few weeks.
Can I downgrade the SM-S948W firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. All decodable builds in the archive share binary 4:
- Binary 4 — since Sep 2026
All SM-S948W firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
S948WVLS4BZIG
Security update
|
4 | XAC | 17 |
2026-09-29 | Download |
|
S948WVLS4BZIG
Security update
|
4 | SOL | 17 |
2026-09-29 | Download |
|
S948WVLS4BZIG
Security update
|
4 | KDO | 17 |
2026-09-29 | Download |
|
S948WVLS4BZIG
Security update
|
4 | PCM | 17 |
2026-09-29 | Download |
|
S948WVLS4BZIG
Security update
|
4 | TLS | 17 |
2026-09-29 | Download |
|
S948WVLS4BZIG
Security update
|
4 | GLW | 17 |
2026-09-29 | Download |
|
S948WVLS4BZIG
Security update
|
4 | VMC | 17 |
2026-09-29 | Download |
|
S948WVLS4BZIG
Security update
|
4 | FIZ | 17 |
2026-09-29 | Download |
|
S948WVLS4BZIG
Security update
|
4 | VTR | 17 |
2026-09-29 | Download |
|
S948WVLS4BZIG
Security update
|
4 | CHR | 17 |
2026-09-29 | Download |
|
S948WVLS4BZIG
Security update
|
4 | FMC | 17 |
2026-09-29 | Download |
|
S948WVLS4BZIG
Security update
|
4 | ESK | 17 |
2026-09-29 | Download |
|
S948WVLS4BZIG
Security update
|
4 | PMB | 17 |
2026-09-29 | Download |
|
S948WVLS4BZIG
Security update
|
4 | BWA | 17 |
2026-09-29 | Download |
|
S948WVLS4BZIG
Security update
|
4 | TBT | 17 |
2026-09-29 | Download |
|
S948WVLS4BZIG
Security update
|
4 | BMC | 17 |
2026-09-29 | Download |
|
S948WVLS4BZIG
Security update
|
4 | RWC | 17 |
2026-09-29 | Download |
|
S948WVLU4BZID
Feature update
|
4 | BWA | 17 |
2026-09-20 | Download |
|
S948WVLU4BZID
Feature update
|
4 | XAC | 17 |
2026-09-20 | Download |
|
S948WVLU4BZID
Feature update
|
4 | PMB | 17 |
2026-09-20 | Download |
Latest SM-S948W 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 |
|---|---|---|---|---|
| BMC | S948WVLS4BZIG | 4 | 17 | 2026-09-29 |
| BWA | S948WVLS4BZIG | 4 | 17 | 2026-09-29 |
| CHR | S948WVLS4BZIG | 4 | 17 | 2026-09-29 |
| ESK | S948WVLS4BZIG | 4 | 17 | 2026-09-29 |
| FIZ | S948WVLS4BZIG | 4 | 17 | 2026-09-29 |
| FMC | S948WVLS4BZIG | 4 | 17 | 2026-09-29 |
| GLW | S948WVLS4BZIG | 4 | 17 | 2026-09-29 |
| KDO | S948WVLS4BZIG | 4 | 17 | 2026-09-29 |
| PCM | S948WVLS4BZIG | 4 | 17 | 2026-09-29 |
| PMB | S948WVLS4BZIG | 4 | 17 | 2026-09-29 |
| RWC | S948WVLS4BZIG | 4 | 17 | 2026-09-29 |
| SOL | S948WVLS4BZIG | 4 | 17 | 2026-09-29 |
| TBT | S948WVLS4BZIG | 4 | 17 | 2026-09-29 |
| TLS | S948WVLS4BZIG | 4 | 17 | 2026-09-29 |
| VMC | S948WVLS4BZIG | 4 | 17 | 2026-09-29 |
| VTR | S948WVLS4BZIG | 4 | 17 | 2026-09-29 |
| XAC | S948WVLS4BZIG | 4 | 17 | 2026-09-29 |
How to Flash SM-S948W 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 4 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.