A366U1UEUADZIF – Galaxy A36 5G firmware

Build A366U1UEUADZIF is a feature update for the Galaxy A36 5G (SM-A366U1) on Android 17 (One UI 9). It first appeared on Samsung's servers on Oct 22, 2026 (method) and has reached 13 regions so far. It keeps bootloader bit 10, so downgrading to the previous build A366U1UESACZH1 is still possible. Samsung still serves this file.

Model
SM-A366U1
Android
Android 17
Type
Feature
Bootloader bit
10
First released
Oct 22, 2026
Regions
13

Rollout timeline by region

The date each region code (CSC) first received A366U1UEUADZIF, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Oct 22, 2026day 0A366U1UEUADZIF/A366U1OYMADZIF/A366U1UEUADZIF
AIOUSA (Cricket)Oct 22, 2026day 0A366U1UEUADZIF/A366U1OYMADZIF/A366U1UEUADZIF
ATTUSA (AT&T)Oct 22, 2026day 0A366U1UEUADZIF/A366U1OYMADZIF/A366U1UEUADZIF
CCTUSA (Comcast)Oct 22, 2026day 0A366U1UEUADZIF/A366U1OYMADZIF/A366U1UEUADZIF
DSAUSAOct 22, 2026day 0A366U1UEUADZIF/A366U1OYMADZIF/A366U1UEUADZIF
DSHUSAOct 22, 2026day 0A366U1UEUADZIF/A366U1OYMADZIF/A366U1UEUADZIF
LRAUSA (Bluegrass)Oct 22, 2026day 0A366U1UEUADZIF/A366U1OYMADZIF/A366U1UEUADZIF
TMBUSA (T-Mobile)Oct 22, 2026day 0A366U1UEUADZIF/A366U1OYMADZIF/A366U1UEUADZIF
TMKUSA (MetroPCS)Oct 22, 2026day 0A366U1UEUADZIF/A366U1OYMADZIF/A366U1UEUADZIF
USCUSA (US Cellular)Oct 22, 2026day 0A366U1UEUADZIF/A366U1OYMADZIF/A366U1UEUADZIF
VZWUSA (Verizon)Oct 22, 2026day 0A366U1UEUADZIF/A366U1OYMADZIF/A366U1UEUADZIF
XAAUSA (unlocked)Oct 22, 2026day 0A366U1UEUADZIF/A366U1OYMADZIF/A366U1UEUADZIF
XARUSA (Cellular South)Oct 22, 2026day 0A366U1UEUADZIF/A366U1OYMADZIF/A366U1UEUADZIF

Download and release notes

samloader download -m SM-A366U1 -r XAA -v A366U1UEUADZIF/A366U1OYMADZIF/A366U1UEUADZIF

Samsung's release notes and security patch level for this update: SM-A366U1 / XAA on doc.samsungmobile.com. What each part of the build number means: decode A366U1UEUADZIF.