S918USQS7FZE3 – Galaxy S23 Ultra firmware
Build S918USQS7FZE3 is a security update for the Galaxy S23 Ultra (SM-S918U)
on Android 16 (One UI 8). It first appeared on Samsung's servers on May 28, 2026 (method) and has reached
9 regions so far. It keeps bootloader bit 7, so downgrading to the previous build S918USQU7FZE2 is still possible. Samsung still serves this file.
- Model
- SM-S918U
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 7
- First released
- May 28, 2026
- Regions
- 9
Rollout timeline by region
The date each region code (CSC) first received S918USQS7FZE3, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
ATT | USA (AT&T) | May 28, 2026 | day 0 | S918USQS7FZE3/S918UOYN7FZE3/S918USQS7FZE3 |
TMB | USA (T-Mobile) | May 31, 2026 | +3 days | S918USQS7FZE3/S918UOYN7FZE3/S918USQS7FZE3 |
TMK | USA (MetroPCS) | May 31, 2026 | +3 days | S918USQS7FZE3/S918UOYN7FZE3/S918USQS7FZE3 |
CCT | USA (Comcast) | Jun 1, 2026 | +4 days | S918USQS7FZE3/S918UOYN7FZE3/S918USQS7FZE3 |
DSA | USA | Jun 1, 2026 | +4 days | S918USQS7FZE3/S918UOYN7FZE3/S918USQS7FZE3 |
DSH | USA | Jun 1, 2026 | +4 days | S918USQS7FZE3/S918UOYN7FZE3/S918USQS7FZE3 |
VZW | USA (Verizon) | Jun 1, 2026 | +4 days | S918USQS7FZE3/S918UOYN7FZE3/S918USQS7FZE3 |
XAA | USA (unlocked) | Jun 2, 2026 | +5 days | S918USQS7FZE3/S918UOYN7FZE3/S918USQS7FZE3 |
USC | USA (US Cellular) | Jun 9, 2026 | +12 days | S918USQS7FZE3/S918UOYN7FZE3/S918USQS7FZE3 |
Download and release notes
samloader download -m SM-S918U -r XAA -v S918USQS7FZE3/S918UOYN7FZE3/S918USQS7FZE3Samsung's release notes and security patch level for this update: SM-S918U / XAA on doc.samsungmobile.com. What each part of the build number means: decode S918USQS7FZE3.