A366USQUADZIF – Galaxy A36 5G firmware

Build A366USQUADZIF is a feature update for the Galaxy A36 5G (SM-A366U) on Android 17 (One UI 9). It first appeared on Samsung's servers on Oct 18, 2026 (method) and has reached 9 regions so far. It keeps bootloader bit 10, so downgrading to the previous build A366USQSACZI4 is still possible. Samsung still serves this file.

Model
SM-A366U
Android
Android 17
Type
Feature
Bootloader bit
10
First released
Oct 18, 2026
Regions
9

Rollout timeline by region

The date each region code (CSC) first received A366USQUADZIF, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
TMBUSA (T-Mobile)Oct 18, 2026day 0A366USQUADZIF/A366UOYNADZIF/A366USQUADZIF
TMKUSA (MetroPCS)Oct 18, 2026day 0A366USQUADZIF/A366UOYNADZIF/A366USQUADZIF
USCUSA (US Cellular)Oct 18, 2026day 0A366USQUADZIF/A366UOYNADZIF/A366USQUADZIF
AIOUSA (Cricket)Oct 18, 2026day 0A366USQUADZIF/A366UOYNADZIF/A366USQUADZIF
ATTUSA (AT&T)Oct 18, 2026day 0A366USQUADZIF/A366UOYNADZIF/A366USQUADZIF
DSAUSAOct 19, 2026+1 dayA366USQUADZIF/A366UOYNADZIF/A366USQUADZIF
DSHUSAOct 19, 2026+1 dayA366USQUADZIF/A366UOYNADZIF/A366USQUADZIF
CCTUSA (Comcast)Oct 21, 2026+3 daysA366USQUADZIF/A366UOYNADZIF/A366USQUADZIF
VZWUSA (Verizon)Oct 21, 2026+3 daysA366USQUADZIF/A366UOYNADZIF/A366USQUADZIF

Download and release notes

samloader download -m SM-A366U -r TMB -v A366USQUADZIF/A366UOYNADZIF/A366USQUADZIF

Samsung's release notes and security patch level for this update: SM-A366U / TMB on doc.samsungmobile.com. What each part of the build number means: decode A366USQUADZIF.