A266U1UEU8CZEA – Galaxy A26 5G firmware

Build A266U1UEU8CZEA is a feature update for the Galaxy A26 5G (SM-A266U1) on Android 16 (One UI 8). It first appeared on Samsung's servers on Jun 2, 2026 (method) and has reached 13 regions so far. It keeps bootloader bit 8, so downgrading to the previous build A266U1UES8BZD4 is still possible. Samsung still serves this file.

Model
SM-A266U1
Android
Android 16
Type
Feature
Bootloader bit
8
First released
Jun 2, 2026
Regions
13

Rollout timeline by region

The date each region code (CSC) first received A266U1UEU8CZEA, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Jun 2, 2026day 0A266U1UEU8CZEA/A266U1OYM8CZEA/A266U1UEU8CZEA
AIOUSA (Cricket)Jun 2, 2026day 0A266U1UEU8CZEA/A266U1OYM8CZEA/A266U1UEU8CZEA
ATTUSA (AT&T)Jun 2, 2026day 0A266U1UEU8CZEA/A266U1OYM8CZEA/A266U1UEU8CZEA
CCTUSA (Comcast)Jun 2, 2026day 0A266U1UEU8CZEA/A266U1OYM8CZEA/A266U1UEU8CZEA
DSAUSAJun 2, 2026day 0A266U1UEU8CZEA/A266U1OYM8CZEA/A266U1UEU8CZEA
DSHUSAJun 2, 2026day 0A266U1UEU8CZEA/A266U1OYM8CZEA/A266U1UEU8CZEA
LRAUSA (Bluegrass)Jun 2, 2026day 0A266U1UEU8CZEA/A266U1OYM8CZEA/A266U1UEU8CZEA
TMBUSA (T-Mobile)Jun 2, 2026day 0A266U1UEU8CZEA/A266U1OYM8CZEA/A266U1UEU8CZEA
TMKUSA (MetroPCS)Jun 2, 2026day 0A266U1UEU8CZEA/A266U1OYM8CZEA/A266U1UEU8CZEA
USCUSA (US Cellular)Jun 2, 2026day 0A266U1UEU8CZEA/A266U1OYM8CZEA/A266U1UEU8CZEA
VZWUSA (Verizon)Jun 2, 2026day 0A266U1UEU8CZEA/A266U1OYM8CZEA/A266U1UEU8CZEA
XAAUSA (unlocked)Jun 2, 2026day 0A266U1UEU8CZEA/A266U1OYM8CZEA/A266U1UEU8CZEA
XARUSA (Cellular South)Jun 2, 2026day 0A266U1UEU8CZEA/A266U1OYM8CZEA/A266U1UEU8CZEA

Download and release notes

samloader download -m SM-A266U1 -r XAA -v A266U1UEU8CZEA/A266U1OYM8CZEA/A266U1UEU8CZEA

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 A266U1UEU8CZEA.