S931USQSCCZF9 – Galaxy S25 firmware

Build S931USQSCCZF9 is a security update for the Galaxy S25 (SM-S931U) on Android 16 (One UI 8). It first appeared on Samsung's servers on Aug 31, 2026 (method) and has reached 10 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 S931USQSBCZF5 is blocked. Samsung still serves this file.

Model
SM-S931U
Android
Android 16
Type
Security
Bootloader bit
12
First released
Aug 31, 2026
Regions
10

Rollout timeline by region

The date each region code (CSC) first received S931USQSCCZF9, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
AIOUSA (Cricket)Aug 31, 2026day 0S931USQSCCZF9/S931UOYNCCZF9/S931USQSCCZF9
ATTUSA (AT&T)Aug 31, 2026day 0S931USQSCCZF9/S931UOYNCCZF9/S931USQSCCZF9
DSAUSAAug 31, 2026day 0S931USQSCCZF9/S931UOYNCCZF9/S931USQSCCZF9
DSHUSAAug 31, 2026day 0S931USQSCCZF9/S931UOYNCCZF9/S931USQSCCZF9
TMBUSA (T-Mobile)Aug 31, 2026day 0S931USQSCCZF9/S931UOYNCCZF9/S931USQSCCZF9
TMKUSA (MetroPCS)Aug 31, 2026day 0S931USQSCCZF9/S931UOYNCCZF9/S931USQSCCZF9
USCUSA (US Cellular)Aug 31, 2026day 0S931USQSCCZF9/S931UOYNCCZF9/S931USQSCCZF9
XAAUSA (unlocked)Aug 31, 2026day 0S931USQSCCZF9/S931UOYNCCZF9/S931USQSCCZF9
CCTUSA (Comcast)Sep 1, 2026+1 dayS931USQSCCZF9/S931UOYNCCZF9/S931USQSCCZF9
VZWUSA (Verizon)Sep 1, 2026+1 dayS931USQSCCZF9/S931UOYNCCZF9/S931USQSCCZF9

Download and release notes

samloader download -m SM-S931U -r XAA -v S931USQSCCZF9/S931UOYNCCZF9/S931USQSCCZF9

Samsung's release notes and security patch level for this update: SM-S931U / XAA on doc.samsungmobile.com. What each part of the build number means: decode S931USQSCCZF9.