A256U1UESEEZH9 – Galaxy A25 5G firmware

Build A256U1UESEEZH9 is a security update for the Galaxy A25 5G (SM-A256U1) on Android 16 (One UI 8). It first appeared on Samsung's servers on Sep 10, 2026 (method) and has reached 13 regions so far. It raises the bootloader bit from 13 to 14: once installed, the device no longer accepts firmware with bit 13 or lower, so a downgrade to A256U1UESDEZG4 is blocked. Samsung still serves this file.

Model
SM-A256U1
Android
Android 16
Type
Security
Bootloader bit
14
First released
Sep 10, 2026
Regions
13

Rollout timeline by region

The date each region code (CSC) first received A256U1UESEEZH9, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Sep 10, 2026day 0A256U1UESEEZH9/A256U1OYMEEZH9/A256U1UESEEZH9
AIOUSA (Cricket)Sep 10, 2026day 0A256U1UESEEZH9/A256U1OYMEEZH9/A256U1UESEEZH9
ATTUSA (AT&T)Sep 10, 2026day 0A256U1UESEEZH9/A256U1OYMEEZH9/A256U1UESEEZH9
CCTUSA (Comcast)Sep 10, 2026day 0A256U1UESEEZH9/A256U1OYMEEZH9/A256U1UESEEZH9
DSAUSASep 10, 2026day 0A256U1UESEEZH9/A256U1OYMEEZH9/A256U1UESEEZH9
DSHUSASep 10, 2026day 0A256U1UESEEZH9/A256U1OYMEEZH9/A256U1UESEEZH9
LRAUSA (Bluegrass)Sep 10, 2026day 0A256U1UESEEZH9/A256U1OYMEEZH9/A256U1UESEEZH9
TMBUSA (T-Mobile)Sep 10, 2026day 0A256U1UESEEZH9/A256U1OYMEEZH9/A256U1UESEEZH9
TMKUSA (MetroPCS)Sep 10, 2026day 0A256U1UESEEZH9/A256U1OYMEEZH9/A256U1UESEEZH9
USCUSA (US Cellular)Sep 10, 2026day 0A256U1UESEEZH9/A256U1OYMEEZH9/A256U1UESEEZH9
VZWUSA (Verizon)Sep 10, 2026day 0A256U1UESEEZH9/A256U1OYMEEZH9/A256U1UESEEZH9
XAAUSA (unlocked)Sep 10, 2026day 0A256U1UESEEZH9/A256U1OYMEEZH9/A256U1UESEEZH9
XARUSA (Cellular South)Sep 10, 2026day 0A256U1UESEEZH9/A256U1OYMEEZH9/A256U1UESEEZH9

Download and release notes

samloader download -m SM-A256U1 -r XAA -v A256U1UESEEZH9/A256U1OYMEEZH9/A256U1UESEEZH9

Samsung's release notes and security patch level for this update: SM-A256U1 / XAA on doc.samsungmobile.com. What each part of the build number means: decode A256U1UESEEZH9.