A276U1UES3AZI3 – Galaxy A27 5G firmware

Build A276U1UES3AZI3 is a security update for the Galaxy A27 5G (SM-A276U1) on Android 16 (One UI 8). It first appeared on Samsung's servers on Oct 6, 2026 (method) and has reached 12 regions so far. It raises the bootloader bit from 2 to 3: once installed, the device no longer accepts firmware with bit 2 or lower, so a downgrade to A276U1UEU2AZH3 is blocked. Samsung still serves this file.

Model
SM-A276U1
Android
Android 16
Type
Security
Bootloader bit
3
First released
Oct 6, 2026
Regions
12

Rollout timeline by region

The date each region code (CSC) first received A276U1UES3AZI3, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Oct 6, 2026day 0A276U1UES3AZI3/A276U1OYM3AZI3/A276U1UES3AZI3
AIOUSA (Cricket)Oct 6, 2026day 0A276U1UES3AZI3/A276U1OYM3AZI3/A276U1UES3AZI3
ATTUSA (AT&T)Oct 6, 2026day 0A276U1UES3AZI3/A276U1OYM3AZI3/A276U1UES3AZI3
CCTUSA (Comcast)Oct 6, 2026day 0A276U1UES3AZI3/A276U1OYM3AZI3/A276U1UES3AZI3
DSAUSAOct 6, 2026day 0A276U1UES3AZI3/A276U1OYM3AZI3/A276U1UES3AZI3
DSHUSAOct 6, 2026day 0A276U1UES3AZI3/A276U1OYM3AZI3/A276U1UES3AZI3
LRAUSA (Bluegrass)Oct 6, 2026day 0A276U1UES3AZI3/A276U1OYM3AZI3/A276U1UES3AZI3
TMBUSA (T-Mobile)Oct 6, 2026day 0A276U1UES3AZI3/A276U1OYM3AZI3/A276U1UES3AZI3
TMKUSA (MetroPCS)Oct 6, 2026day 0A276U1UES3AZI3/A276U1OYM3AZI3/A276U1UES3AZI3
VZWUSA (Verizon)Oct 6, 2026day 0A276U1UES3AZI3/A276U1OYM3AZI3/A276U1UES3AZI3
XAAUSA (unlocked)Oct 6, 2026day 0A276U1UES3AZI3/A276U1OYM3AZI3/A276U1UES3AZI3
XARUSA (Cellular South)Oct 6, 2026day 0A276U1UES3AZI3/A276U1OYM3AZI3/A276U1UES3AZI3

Download and release notes

samloader download -m SM-A276U1 -r XAA -v A276U1UES3AZI3/A276U1OYM3AZI3/A276U1UES3AZI3

Samsung's release notes and security patch level for this update: SM-A276U1 / XAA on doc.samsungmobile.com. What each part of the build number means: decode A276U1UES3AZI3.