S938USQUCDZIF – Galaxy S25 Ultra firmware
Build S938USQUCDZIF is a feature update for the Galaxy S25 Ultra (SM-S938U)
on Android 17 (One UI 9). It first appeared on Samsung's servers on Oct 4, 2026 (method) and has reached
9 regions so far. It keeps bootloader bit 12, so downgrading to the previous build S938USQSCCZF9 is still possible. Samsung still serves this file.
- Model
- SM-S938U
- Android
- Android 17
- Type
- Feature
- Bootloader bit
- 12
- First released
- Oct 4, 2026
- Regions
- 9
Rollout timeline by region
The date each region code (CSC) first received S938USQUCDZIF, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
ATT | USA (AT&T) | Oct 4, 2026 | day 0 | S938USQUCDZIF/S938UOYNCDZIF/S938USQUCDZIF |
TMB | USA (T-Mobile) | Oct 4, 2026 | day 0 | S938USQUCDZIF/S938UOYNCDZIF/S938USQUCDZIF |
TMK | USA (MetroPCS) | Oct 4, 2026 | day 0 | S938USQUCDZIF/S938UOYNCDZIF/S938USQUCDZIF |
USC | USA (US Cellular) | Oct 4, 2026 | day 0 | S938USQUCDZIF/S938UOYNCDZIF/S938USQUCDZIF |
VZW | USA (Verizon) | Oct 6, 2026 | +2 days | S938USQUCDZIF/S938UOYNCDZIF/S938USQUCDZIF |
DSA | USA | Oct 7, 2026 | +3 days | S938USQUCDZIF/S938UOYNCDZIF/S938USQUCDZIF |
DSH | USA | Oct 7, 2026 | +3 days | S938USQUCDZIF/S938UOYNCDZIF/S938USQUCDZIF |
CCT | USA (Comcast) | Oct 7, 2026 | +3 days | S938USQUCDZIF/S938UOYNCDZIF/S938USQUCDZIF |
XAA | USA (unlocked) | Oct 7, 2026 | +3 days | S938USQUCDZIF/S938UOYNCDZIF/S938USQUCDZIF |
Download and release notes
samloader download -m SM-S938U -r XAA -v S938USQUCDZIF/S938UOYNCDZIF/S938USQUCDZIFSamsung'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 S938USQUCDZIF.