A156U1UESADZB5 – Galaxy A15 5G firmware

Build A156U1UESADZB5 is a security update for the Galaxy A15 5G (SM-A156U1) on Android 16 (One UI 8). It first appeared on Samsung's servers on Mar 16, 2026 (method) and has reached 13 regions so far. It raises the bootloader bit from 9 to 10: once installed, the device no longer accepts firmware with bit 9 or lower, so a downgrade to A156U1UES9DZA1 is blocked. Samsung still serves this file.

Model
SM-A156U1
Android
Android 16
Type
Security
Bootloader bit
10
First released
Mar 16, 2026
Regions
13

Rollout timeline by region

The date each region code (CSC) first received A156U1UESADZB5, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Mar 16, 2026day 0A156U1UESADZB5/A156U1OYMADZB5/A156U1UESADZB5
AIOUSA (Cricket)Mar 16, 2026day 0A156U1UESADZB5/A156U1OYMADZB5/A156U1UESADZB5
ATTUSA (AT&T)Mar 16, 2026day 0A156U1UESADZB5/A156U1OYMADZB5/A156U1UESADZB5
CCTUSA (Comcast)Mar 16, 2026day 0A156U1UESADZB5/A156U1OYMADZB5/A156U1UESADZB5
DSAUSAMar 16, 2026day 0A156U1UESADZB5/A156U1OYMADZB5/A156U1UESADZB5
DSHUSAMar 16, 2026day 0A156U1UESADZB5/A156U1OYMADZB5/A156U1UESADZB5
LRAUSA (Bluegrass)Mar 16, 2026day 0A156U1UESADZB5/A156U1OYMADZB5/A156U1UESADZB5
TMBUSA (T-Mobile)Mar 16, 2026day 0A156U1UESADZB5/A156U1OYMADZB5/A156U1UESADZB5
TMKUSA (MetroPCS)Mar 16, 2026day 0A156U1UESADZB5/A156U1OYMADZB5/A156U1UESADZB5
USCUSA (US Cellular)Mar 16, 2026day 0A156U1UESADZB5/A156U1OYMADZB5/A156U1UESADZB5
VZWUSA (Verizon)Mar 16, 2026day 0A156U1UESADZB5/A156U1OYMADZB5/A156U1UESADZB5
XAAUSA (unlocked)Mar 16, 2026day 0A156U1UESADZB5/A156U1OYMADZB5/A156U1UESADZB5
XARUSA (Cellular South)Mar 16, 2026day 0A156U1UESADZB5/A156U1OYMADZB5/A156U1UESADZB5

Download and release notes

samloader download -m SM-A156U1 -r XAA -v A156U1UESADZB5/A156U1OYMADZB5/A156U1UESADZB5

Samsung's release notes and security patch level for this update: SM-A156U1 / XAA on doc.samsungmobile.com. What each part of the build number means: decode A156U1UESADZB5.