Samsung Galaxy S23 Ultra (SM-S918U) Firmware Overview
What is the latest SM-S918U firmware?
S918USQU8GZIF, released September 29, 2026 with Android 17. It is a feature update on bootloader binary 8. The archive holds 97 official builds across 11 regions (CSC).
Is the Samsung Galaxy S23 Ultra still getting updates?
Yes. The newest build is from September 2026, and 10 of 11 regions already have a build from that month; the rest usually follow within a few weeks.
Which Android versions did it get?
The SM-S918U builds in the archive run Android 16 to 17. The earliest build we have for each version:
- Android 17: S918USQU8GZIF (Sep 2026), 6 builds in total
- Android 16: S918USQS6EYL1 (Dec 2025), 91 builds in total
Can I downgrade the SM-S918U firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. In the archive the binary of this model rose from 6 to 8:
- Binary 8 — since Jun 2026
- Binary 7 — since Feb 2026
- Binary 6 — since Dec 2025
A phone already on binary 8 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 8 build. How to read a build number.
All SM-S918U firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
S918USQU8GZIF
Feature update
|
8 | DSA | 17 |
2026-09-29 | Download |
|
S918USQU8GZIF
Feature update
|
8 | DSH | 17 |
2026-09-29 | Download |
|
S918USQU8GZIF
Feature update
|
8 | ATT | 17 |
2026-09-29 | Download |
|
S918USQU8GZIF
Feature update
|
8 | USC | 17 |
2026-09-29 | Download |
|
S918USQU8GZIF
Feature update
|
8 | TMK | 17 |
2026-09-29 | Download |
|
S918USQU8GZIF
Feature update
|
8 | TMB | 17 |
2026-09-29 | Download |
|
S918USQS8FZI1
Security update
|
8 | CCT | 16 |
2026-09-14 | Download |
|
S918USQS8FZI1
Security update
|
8 | TMB | 16 |
2026-09-14 | Download |
|
S918USQS8FZI1
Security update
|
8 | TMK | 16 |
2026-09-14 | Download |
|
S918USQS8FZI1
Security update
|
8 | ATT | 16 |
2026-09-14 | Download |
|
S918USQS8FZI1
Security update
|
8 | CHA | 16 |
2026-09-14 | Download |
|
S918USQS8FZI1
Security update
|
8 | DSA | 16 |
2026-09-14 | Download |
|
S918USQS8FZI1
Security update
|
8 | DSH | 16 |
2026-09-14 | Download |
|
S918USQS8FZI1
Security update
|
8 | VZW | 16 |
2026-09-14 | Download |
|
S918USQS8FZI1
Security update
|
8 | XAA | 16 |
2026-09-14 | Download |
|
S918USQS8FZI1
Security update
|
8 | USC | 16 |
2026-09-14 | Download |
|
S918USQS8FZH3
Security update
|
8 | XAA | 16 |
2026-08-17 | Download |
|
S918USQS8FZH3
Security update
|
8 | LLA | 16 |
2026-08-14 | Download |
|
S918USQS8FZH3
Security update
|
8 | VZW | 16 |
2026-08-14 | Download |
|
S918USQS8FZH3
Security update
|
8 | USC | 16 |
2026-08-12 | Download |
|
S918USQS8FZH3
Security update
|
8 | TMB | 16 |
2026-08-12 | Download |
|
S918USQS8FZH3
Security update
|
8 | DSA | 16 |
2026-08-12 | Download |
|
S918USQS8FZH3
Security update
|
8 | DSH | 16 |
2026-08-12 | Download |
|
S918USQS8FZH3
Security update
|
8 | CCT | 16 |
2026-08-12 | Download |
|
S918USQS8FZH3
Security update
|
8 | CHA | 16 |
2026-08-12 | Download |
|
S918USQS8FZH3
Security update
|
8 | ATT | 16 |
2026-08-12 | Download |
|
S918USQS8FZH3
Security update
|
8 | TMK | 16 |
2026-08-12 | Download |
|
S918USQS8FZG1
Security update
|
8 | LLA | 16 |
2026-07-17 | Download |
|
S918USQS8FZG1
Security update
|
8 | DSA | 16 |
2026-07-08 | Download |
|
S918USQS8FZG1
Security update
|
8 | TMB | 16 |
2026-07-08 | Download |
|
S918USQS8FZG1
Security update
|
8 | USC | 16 |
2026-07-08 | Download |
|
S918USQS8FZG1
Security update
|
8 | DSH | 16 |
2026-07-08 | Download |
|
S918USQS8FZG1
Security update
|
8 | ATT | 16 |
2026-07-08 | Download |
|
S918USQS8FZG1
Security update
|
8 | CHA | 16 |
2026-07-08 | Download |
|
S918USQS8FZG1
Security update
|
8 | CCT | 16 |
2026-07-08 | Download |
|
S918USQS8FZG1
Security update
|
8 | XAA | 16 |
2026-07-08 | Download |
|
S918USQS8FZF5
Security update
|
8 | LLA | 16 |
2026-06-17 | Download |
|
S918USQS8FZF5
Security update
|
8 | CCT | 16 |
2026-06-15 | Download |
|
S918USQS8FZF5
Security update
|
8 | CHA | 16 |
2026-06-15 | Download |
|
S918USQS8FZF5
Security update
|
8 | ATT | 16 |
2026-06-15 | Download |
|
S918USQS8FZF5
Security update
|
8 | USC | 16 |
2026-06-15 | Download |
|
S918USQS8FZF5
Security update
|
8 | DSH | 16 |
2026-06-15 | Download |
|
S918USQS8FZF5
Security update
|
8 | DSA | 16 |
2026-06-15 | Download |
|
S918USQS8FZF5
Security update
|
8 | TMB | 16 |
2026-06-15 | Download |
|
S918USQS8FZF5
Security update
|
8 | XAA | 16 |
2026-06-15 | Download |
|
S918USQS7FZE3
Security update
|
7 | CCT | 16 |
2026-05-28 | Download |
|
S918USQS7FZE3
Security update
|
7 | XAA | 16 |
2026-05-19 | Download |
|
S918USQS7FZE3
Security update
|
7 | TMK | 16 |
2026-05-18 | Download |
|
S918USQS7FZE3
Security update
|
7 | TMB | 16 |
2026-05-18 | Download |
|
S918USQS7FZE3
Security update
|
7 | DSA | 16 |
2026-05-18 | Download |
|
S918USQS7FZE3
Security update
|
7 | USC | 16 |
2026-05-18 | Download |
|
S918USQS7FZE3
Security update
|
7 | ATT | 16 |
2026-05-18 | Download |
|
S918USQS7FZE3
Security update
|
7 | DSH | 16 |
2026-05-18 | Download |
|
S918USQU7FZE2
Feature update
|
7 | LLA | 16 |
2026-05-09 | Download |
|
S918USQS7EZCI
Security update
|
7 | XAA | 16 |
2026-04-21 | Download |
|
S918USQS7EZCI
Security update
|
7 | VZW | 16 |
2026-04-21 | Download |
|
S918USQS7EZCI
Security update
|
7 | CHA | 16 |
2026-04-21 | Download |
|
S918USQS7EZCI
Security update
|
7 | CCT | 16 |
2026-04-21 | Download |
|
S918USQS7EZCI
Security update
|
7 | TMB | 16 |
2026-04-16 | Download |
|
S918USQS7EZCI
Security update
|
7 | TMK | 16 |
2026-04-16 | Download |
|
S918USQS7EZCI
Security update
|
7 | USC | 16 |
2026-04-15 | Download |
|
S918USQS7EZCI
Security update
|
7 | DSH | 16 |
2026-04-15 | Download |
|
S918USQS7EZCI
Security update
|
7 | ATT | 16 |
2026-04-15 | Download |
|
S918USQS7EZCI
Security update
|
7 | DSA | 16 |
2026-04-15 | Download |
|
S918USQS7EZC1
Security update
|
7 | XAA | 16 |
2026-04-07 | Download |
|
S918USQS7EZC1
Security update
|
7 | CHA | 16 |
2026-04-07 | Download |
|
S918USQS7EZB7
Security update
|
7 | LLA | 16 |
2026-03-06 | Download |
|
S918USQS7EZB6
Security update
|
7 | XAA | 16 |
2026-03-05 | Download |
|
S918USQS7EZB6
Security update
|
7 | ATT | 16 |
2026-03-05 | Download |
|
S918USQS7EZB6
Security update
|
7 | VZW | 16 |
2026-03-05 | Download |
|
S918USQS7EZB6
Security update
|
7 | TMB | 16 |
2026-03-05 | Download |
|
S918USQS7EZB6
Security update
|
7 | TMK | 16 |
2026-03-05 | Download |
|
S918USQS7EZB6
Security update
|
7 | CHA | 16 |
2026-03-05 | Download |
|
S918USQS7EZB6
Security update
|
7 | CCT | 16 |
2026-03-05 | Download |
|
S918USQS7EZB6
Security update
|
7 | DSA | 16 |
2026-03-03 | Download |
|
S918USQS7EZB6
Security update
|
7 | DSH | 16 |
2026-03-03 | Download |
|
S918USQS7EZB6
Security update
|
7 | USC | 16 |
2026-03-03 | Download |
|
S918USQS6EZA1
Security update
|
6 | XAA | 16 |
2026-01-30 | Download |
|
S918USQS6EZA1
Security update
|
6 | VZW | 16 |
2026-01-30 | Download |
|
S918USQS6EZA2
Security update
|
6 | LLA | 16 |
2026-01-30 | Download |
|
S918USQS6EZA1
Security update
|
6 | CHA | 16 |
2026-01-29 | Download |
|
S918USQS6EZA1
Security update
|
6 | CCT | 16 |
2026-01-29 | Download |
|
S918USQS6EZA1
Security update
|
6 | DSA | 16 |
2026-01-28 | Download |
|
S918USQS6EZA1
Security update
|
6 | USC | 16 |
2026-01-28 | Download |
|
S918USQS6EZA1
Security update
|
6 | DSH | 16 |
2026-01-28 | Download |
|
S918USQS6EZA1
Security update
|
6 | TMK | 16 |
2026-01-27 | Download |
|
S918USQS6EZA1
Security update
|
6 | TMB | 16 |
2026-01-27 | Download |
|
S918USQS6EZA1
Security update
|
6 | ATT | 16 |
2026-01-27 | Download |
|
S918USQS6EYL1
Security update
|
6 | XAA | 16 |
2025-12-22 | Download |
|
S918USQS6EYL1
Security update
|
6 | CHA | 16 |
2025-12-22 | Download |
|
S918USQS6EYL1
Security update
|
6 | CCT | 16 |
2025-12-22 | Download |
|
S918USQS6EYL1
Security update
|
6 | VZW | 16 |
2025-12-19 | Download |
|
S918USQS6EYL1
Security update
|
6 | ATT | 16 |
2025-12-18 | Download |
|
S918USQS6EYL1
Security update
|
6 | USC | 16 |
2025-12-18 | Download |
|
S918USQS6EYL1
Security update
|
6 | DSH | 16 |
2025-12-18 | Download |
|
S918USQS6EYL1
Security update
|
6 | TMB | 16 |
2025-12-18 | Download |
|
S918USQS6EYL1
Security update
|
6 | TMK | 16 |
2025-12-18 | Download |
Latest SM-S918U 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 |
|---|---|---|---|---|
| ATT | S918USQU8GZIF | 8 | 17 | 2026-09-29 |
| CCT | S918USQS8FZI1 | 8 | 16 | 2026-09-14 |
| CHA | S918USQS8FZI1 | 8 | 16 | 2026-09-14 |
| DSA | S918USQU8GZIF | 8 | 17 | 2026-09-29 |
| DSH | S918USQU8GZIF | 8 | 17 | 2026-09-29 |
| LLA | S918USQS8FZH3 | 8 | 16 | 2026-08-14 |
| TMB | S918USQU8GZIF | 8 | 17 | 2026-09-29 |
| TMK | S918USQU8GZIF | 8 | 17 | 2026-09-29 |
| USC | S918USQU8GZIF | 8 | 17 | 2026-09-29 |
| VZW | S918USQS8FZI1 | 8 | 16 | 2026-09-14 |
| XAA | S918USQS8FZI1 | 8 | 16 | 2026-09-14 |
How to Flash SM-S918U Firmware
Put the Samsung Galaxy S23 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 8 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.