S938USQUACZF1 – Galaxy S25 Ultra firmware
Build S938USQUACZF1 is a feature update for the Galaxy S25 Ultra (SM-S938U)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Jun 14, 2026 (method) and has reached
9 regions so far. It keeps bootloader bit 10, so downgrading to the previous build S938USQSACZE1 is still possible. Samsung still serves this file.
- Model
- SM-S938U
- Android
- Android 16
- Type
- Feature
- Bootloader bit
- 10
- First released
- Jun 14, 2026
- Regions
- 9
Rollout timeline by region
The date each region code (CSC) first received S938USQUACZF1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
XAA | USA (unlocked) | Jun 14, 2026 | day 0 | S938USQUACZF1/S938UOYNACZF1/S938USQUACZF1 |
ATT | USA (AT&T) | Jun 14, 2026 | day 0 | S938USQUACZF1/S938UOYNACZF1/S938USQUACZF1 |
TMB | USA (T-Mobile) | Jun 15, 2026 | +1 day | S938USQUACZF1/S938UOYNACZF1/S938USQUACZF1 |
TMK | USA (MetroPCS) | Jun 15, 2026 | +1 day | S938USQUACZF1/S938UOYNACZF1/S938USQUACZF1 |
CCT | USA (Comcast) | Jun 16, 2026 | +2 days | S938USQUACZF1/S938UOYNACZF1/S938USQUACZF1 |
DSA | USA | Jun 16, 2026 | +2 days | S938USQUACZF1/S938UOYNACZF1/S938USQUACZF1 |
DSH | USA | Jun 16, 2026 | +2 days | S938USQUACZF1/S938UOYNACZF1/S938USQUACZF1 |
VZW | USA (Verizon) | Jun 16, 2026 | +2 days | S938USQUACZF1/S938UOYNACZF1/S938USQUACZF1 |
USC | USA (US Cellular) | Jun 22, 2026 | +8 days | S938USQUACZF1/S938UOYNACZF1/S938USQUACZF1 |
Download and release notes
samloader download -m SM-S938U -r XAA -v S938USQUACZF1/S938UOYNACZF1/S938USQUACZF1Samsung's release notes and security patch level for this update: SM-S938U / XAA on doc.samsungmobile.com. What each part of the build number means: decode S938USQUACZF1.