S931U1UEUACZF1 – Galaxy S25 firmware

Build S931U1UEUACZF1 is a feature update for the Galaxy S25 (SM-S931U1) on Android 16 (One UI 8). It first appeared on Samsung's servers on Jun 15, 2026 (method) and has reached 14 regions so far. It keeps bootloader bit 10, so downgrading to the previous build S931U1UESACZE1 is still possible. Samsung still serves this file.

Model
SM-S931U1
Android
Android 16
Type
Feature
Bootloader bit
10
First released
Jun 15, 2026
Regions
14

Rollout timeline by region

The date each region code (CSC) first received S931U1UEUACZF1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Jun 15, 2026day 0S931U1UEUACZF1/S931U1OYMACZF1/S931U1UEUACZF1
AIOUSA (Cricket)Jun 15, 2026day 0S931U1UEUACZF1/S931U1OYMACZF1/S931U1UEUACZF1
ATTUSA (AT&T)Jun 15, 2026day 0S931U1UEUACZF1/S931U1OYMACZF1/S931U1UEUACZF1
CCTUSA (Comcast)Jun 15, 2026day 0S931U1UEUACZF1/S931U1OYMACZF1/S931U1UEUACZF1
DSAUSAJun 15, 2026day 0S931U1UEUACZF1/S931U1OYMACZF1/S931U1UEUACZF1
DSHUSAJun 15, 2026day 0S931U1UEUACZF1/S931U1OYMACZF1/S931U1UEUACZF1
LRAUSA (Bluegrass)Jun 15, 2026day 0S931U1UEUACZF1/S931U1OYMACZF1/S931U1UEUACZF1
TFNUSA (TracFone)Jun 15, 2026day 0S931U1UEUACZF1/S931U1OYMACZF1/S931U1UEUACZF1
TMBUSA (T-Mobile)Jun 15, 2026day 0S931U1UEUACZF1/S931U1OYMACZF1/S931U1UEUACZF1
TMKUSA (MetroPCS)Jun 15, 2026day 0S931U1UEUACZF1/S931U1OYMACZF1/S931U1UEUACZF1
USCUSA (US Cellular)Jun 15, 2026day 0S931U1UEUACZF1/S931U1OYMACZF1/S931U1UEUACZF1
VZWUSA (Verizon)Jun 15, 2026day 0S931U1UEUACZF1/S931U1OYMACZF1/S931U1UEUACZF1
XAAUSA (unlocked)Jun 15, 2026day 0S931U1UEUACZF1/S931U1OYMACZF1/S931U1UEUACZF1
XARUSA (Cellular South)Jun 15, 2026day 0S931U1UEUACZF1/S931U1OYMACZF1/S931U1UEUACZF1

Download and release notes

samloader download -m SM-S931U1 -r XAA -v S931U1UEUACZF1/S931U1OYMACZF1/S931U1UEUACZF1

Samsung's release notes and security patch level for this update: SM-S931U1 / XAA on doc.samsungmobile.com. What each part of the build number means: decode S931U1UEUACZF1.