A256U1UESBDZB2 – Galaxy A25 5G firmware

Build A256U1UESBDZB2 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 Mar 15, 2026 (method) and has reached 13 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 A256U1UESADZA3 is blocked. Samsung still serves this file.

Model
SM-A256U1
Android
Android 16
Type
Security
Bootloader bit
11
First released
Mar 15, 2026
Regions
13

Rollout timeline by region

The date each region code (CSC) first received A256U1UESBDZB2, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Mar 15, 2026day 0A256U1UESBDZB2/A256U1OYMBDZB2/A256U1UESBDZB2
AIOUSA (Cricket)Mar 15, 2026day 0A256U1UESBDZB2/A256U1OYMBDZB2/A256U1UESBDZB2
ATTUSA (AT&T)Mar 15, 2026day 0A256U1UESBDZB2/A256U1OYMBDZB2/A256U1UESBDZB2
CCTUSA (Comcast)Mar 15, 2026day 0A256U1UESBDZB2/A256U1OYMBDZB2/A256U1UESBDZB2
DSAUSAMar 15, 2026day 0A256U1UESBDZB2/A256U1OYMBDZB2/A256U1UESBDZB2
DSHUSAMar 15, 2026day 0A256U1UESBDZB2/A256U1OYMBDZB2/A256U1UESBDZB2
LRAUSA (Bluegrass)Mar 15, 2026day 0A256U1UESBDZB2/A256U1OYMBDZB2/A256U1UESBDZB2
TMBUSA (T-Mobile)Mar 15, 2026day 0A256U1UESBDZB2/A256U1OYMBDZB2/A256U1UESBDZB2
TMKUSA (MetroPCS)Mar 15, 2026day 0A256U1UESBDZB2/A256U1OYMBDZB2/A256U1UESBDZB2
USCUSA (US Cellular)Mar 15, 2026day 0A256U1UESBDZB2/A256U1OYMBDZB2/A256U1UESBDZB2
VZWUSA (Verizon)Mar 15, 2026day 0A256U1UESBDZB2/A256U1OYMBDZB2/A256U1UESBDZB2
XAAUSA (unlocked)Mar 15, 2026day 0A256U1UESBDZB2/A256U1OYMBDZB2/A256U1UESBDZB2
XARUSA (Cellular South)Mar 15, 2026day 0A256U1UESBDZB2/A256U1OYMBDZB2/A256U1UESBDZB2

Download and release notes

samloader download -m SM-A256U1 -r XAA -v A256U1UESBDZB2/A256U1OYMBDZB2/A256U1UESBDZB2

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 A256U1UESBDZB2.