A256U1UESDEZG4 – Galaxy A25 5G firmware

Build A256U1UESDEZG4 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 Aug 16, 2026 (method) and has reached 13 regions so far. It raises the bootloader bit from 12 to 13: once installed, the device no longer accepts firmware with bit 12 or lower, so a downgrade to A256U1UEUCEZE6 is blocked. Samsung still serves this file.

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

Rollout timeline by region

The date each region code (CSC) first received A256U1UESDEZG4, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Aug 16, 2026day 0A256U1UESDEZG4/A256U1OYMDEZG4/A256U1UESDEZG4
AIOUSA (Cricket)Aug 16, 2026day 0A256U1UESDEZG4/A256U1OYMDEZG4/A256U1UESDEZG4
ATTUSA (AT&T)Aug 16, 2026day 0A256U1UESDEZG4/A256U1OYMDEZG4/A256U1UESDEZG4
CCTUSA (Comcast)Aug 16, 2026day 0A256U1UESDEZG4/A256U1OYMDEZG4/A256U1UESDEZG4
DSAUSAAug 16, 2026day 0A256U1UESDEZG4/A256U1OYMDEZG4/A256U1UESDEZG4
DSHUSAAug 16, 2026day 0A256U1UESDEZG4/A256U1OYMDEZG4/A256U1UESDEZG4
LRAUSA (Bluegrass)Aug 16, 2026day 0A256U1UESDEZG4/A256U1OYMDEZG4/A256U1UESDEZG4
TMBUSA (T-Mobile)Aug 16, 2026day 0A256U1UESDEZG4/A256U1OYMDEZG4/A256U1UESDEZG4
TMKUSA (MetroPCS)Aug 16, 2026day 0A256U1UESDEZG4/A256U1OYMDEZG4/A256U1UESDEZG4
USCUSA (US Cellular)Aug 16, 2026day 0A256U1UESDEZG4/A256U1OYMDEZG4/A256U1UESDEZG4
VZWUSA (Verizon)Aug 16, 2026day 0A256U1UESDEZG4/A256U1OYMDEZG4/A256U1UESDEZG4
XAAUSA (unlocked)Aug 16, 2026day 0A256U1UESDEZG4/A256U1OYMDEZG4/A256U1UESDEZG4
XARUSA (Cellular South)Aug 16, 2026day 0A256U1UESDEZG4/A256U1OYMDEZG4/A256U1UESDEZG4

Download and release notes

samloader download -m SM-A256U1 -r XAA -v A256U1UESDEZG4/A256U1OYMDEZG4/A256U1UESDEZG4

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 A256U1UESDEZG4.