A266U1UEUADZJ5 – Galaxy A26 5G firmware

Build A266U1UEUADZJ5 is a feature update for the Galaxy A26 5G (SM-A266U1) on Android 17 (One UI 9). It first appeared on Samsung's servers on Nov 2, 2026 (method) and has reached 13 regions so far. It keeps bootloader bit 10, so downgrading to the previous build A266U1UESACZH3 is still possible. Samsung still serves this file.

Model
SM-A266U1
Android
Android 17
Type
Feature
Bootloader bit
10
First released
Nov 2, 2026
Regions
13

Rollout timeline by region

The date each region code (CSC) first received A266U1UEUADZJ5, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Nov 2, 2026day 0A266U1UEUADZJ5/A266U1OYMADZJ5/A266U1UEUADZJ5
AIOUSA (Cricket)Nov 2, 2026day 0A266U1UEUADZJ5/A266U1OYMADZJ5/A266U1UEUADZJ5
ATTUSA (AT&T)Nov 2, 2026day 0A266U1UEUADZJ5/A266U1OYMADZJ5/A266U1UEUADZJ5
CCTUSA (Comcast)Nov 2, 2026day 0A266U1UEUADZJ5/A266U1OYMADZJ5/A266U1UEUADZJ5
DSAUSANov 2, 2026day 0A266U1UEUADZJ5/A266U1OYMADZJ5/A266U1UEUADZJ5
DSHUSANov 2, 2026day 0A266U1UEUADZJ5/A266U1OYMADZJ5/A266U1UEUADZJ5
LRAUSA (Bluegrass)Nov 2, 2026day 0A266U1UEUADZJ5/A266U1OYMADZJ5/A266U1UEUADZJ5
TMBUSA (T-Mobile)Nov 2, 2026day 0A266U1UEUADZJ5/A266U1OYMADZJ5/A266U1UEUADZJ5
TMKUSA (MetroPCS)Nov 2, 2026day 0A266U1UEUADZJ5/A266U1OYMADZJ5/A266U1UEUADZJ5
USCUSA (US Cellular)Nov 2, 2026day 0A266U1UEUADZJ5/A266U1OYMADZJ5/A266U1UEUADZJ5
VZWUSA (Verizon)Nov 2, 2026day 0A266U1UEUADZJ5/A266U1OYMADZJ5/A266U1UEUADZJ5
XAAUSA (unlocked)Nov 2, 2026day 0A266U1UEUADZJ5/A266U1OYMADZJ5/A266U1UEUADZJ5
XARUSA (Cellular South)Nov 2, 2026day 0A266U1UEUADZJ5/A266U1OYMADZJ5/A266U1UEUADZJ5

Download and release notes

samloader download -m SM-A266U1 -r XAA -v A266U1UEUADZJ5/A266U1OYMADZJ5/A266U1UEUADZJ5

Samsung's release notes and security patch level for this update: SM-A266U1 / XAA on doc.samsungmobile.com. What each part of the build number means: decode A266U1UEUADZJ5.