S938USQSBCZF5 – Galaxy S25 Ultra firmware

Build S938USQSBCZF5 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 Jul 14, 2026 (method) and has reached 9 regions so far. It raises the bootloader bit from 10 to 11: once installed, the device no longer accepts firmware with bit 10 or lower, so a downgrade to S938USQUACZF1 is blocked. Samsung still serves this file.

Model
SM-S938U
Android
Android 16
Type
Security
Bootloader bit
11
First released
Jul 14, 2026
Regions
9

Rollout timeline by region

The date each region code (CSC) first received S938USQSBCZF5, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
DSAUSAJul 14, 2026day 0S938USQSBCZF5/S938UOYNBCZF5/S938USQSBCZF5
DSHUSAJul 14, 2026day 0S938USQSBCZF5/S938UOYNBCZF5/S938USQSBCZF5
TMBUSA (T-Mobile)Jul 14, 2026day 0S938USQSBCZF5/S938UOYNBCZF5/S938USQSBCZF5
TMKUSA (MetroPCS)Jul 14, 2026day 0S938USQSBCZF5/S938UOYNBCZF5/S938USQSBCZF5
CCTUSA (Comcast)Jul 14, 2026day 0S938USQSBCZF5/S938UOYNBCZF5/S938USQSBCZF5
VZWUSA (Verizon)Jul 14, 2026day 0S938USQSBCZF5/S938UOYNBCZF5/S938USQSBCZF5
ATTUSA (AT&T)Jul 15, 2026+1 dayS938USQSBCZF5/S938UOYNBCZF5/S938USQSBCZF5
XAAUSA (unlocked)Jul 15, 2026+1 dayS938USQSBCZF5/S938UOYNBCZF5/S938USQSBCZF5
USCUSA (US Cellular)Jul 20, 2026+6 daysS938USQSBCZF5/S938UOYNBCZF5/S938USQSBCZF5

Download and release notes

samloader download -m SM-S938U -r XAA -v S938USQSBCZF5/S938UOYNBCZF5/S938USQSBCZF5

Samsung'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 S938USQSBCZF5.