S938USQSCCZF9 – Galaxy S25 Ultra firmware
Build S938USQSCCZF9 is a security update for the Galaxy S25 Ultra (SM-S938U)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Aug 31, 2026 (method) and has reached
9 regions so far. It raises the bootloader bit from 11 to 12: once installed, the device no longer accepts firmware with bit 11 or lower, so a downgrade to S938USQSBCZF5 is blocked. Samsung still serves this file.
- Model
- SM-S938U
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 12
- First released
- Aug 31, 2026
- Regions
- 9
Rollout timeline by region
The date each region code (CSC) first received S938USQSCCZF9, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
XAA | USA (unlocked) | Aug 31, 2026 | day 0 | S938USQSCCZF9/S938UOYNCCZF9/S938USQSCCZF9 |
ATT | USA (AT&T) | Aug 31, 2026 | day 0 | S938USQSCCZF9/S938UOYNCCZF9/S938USQSCCZF9 |
DSA | USA | Aug 31, 2026 | day 0 | S938USQSCCZF9/S938UOYNCCZF9/S938USQSCCZF9 |
DSH | USA | Aug 31, 2026 | day 0 | S938USQSCCZF9/S938UOYNCCZF9/S938USQSCCZF9 |
TMB | USA (T-Mobile) | Aug 31, 2026 | day 0 | S938USQSCCZF9/S938UOYNCCZF9/S938USQSCCZF9 |
TMK | USA (MetroPCS) | Aug 31, 2026 | day 0 | S938USQSCCZF9/S938UOYNCCZF9/S938USQSCCZF9 |
USC | USA (US Cellular) | Aug 31, 2026 | day 0 | S938USQSCCZF9/S938UOYNCCZF9/S938USQSCCZF9 |
CCT | USA (Comcast) | Sep 1, 2026 | +1 day | S938USQSCCZF9/S938UOYNCCZF9/S938USQSCCZF9 |
VZW | USA (Verizon) | Sep 1, 2026 | +1 day | S938USQSCCZF9/S938UOYNCCZF9/S938USQSCCZF9 |
Download and release notes
samloader download -m SM-S938U -r XAA -v S938USQSCCZF9/S938UOYNCCZF9/S938USQSCCZF9Samsung'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 S938USQSCCZF9.