Samsung Galaxy A36 5G (SM-A366U1) Firmware Overview
What is the latest SM-A366U1 firmware?
A366U1UESACZI1, released October 9, 2026 with Android 16. It is a security update on bootloader binary 10. The archive holds 20 official builds across 20 regions (CSC). Each one is the full stock ROM (flash file) for Odin, not an OTA patch.
Is the Samsung Galaxy A36 5G still getting updates?
Yes. The newest build is from October 2026, and 20 of 20 regions already have a build from that month; the rest usually follow within a few weeks.
Which Android versions did it get?
The SM-A366U1 builds in the archive run Android 16 to 17. The earliest build we have for each version:
- Android 17: A366U1UEUADZIF (Oct 2026), 19 builds in total
- Android 16: A366U1UESACZI1 (Oct 2026), 1 build in total
Can I downgrade the SM-A366U1 firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. All decodable builds in the archive share binary 10:
- Binary 10 — since Sep 2026
All SM-A366U1 firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
A366U1UESACZI1
Security update
|
10 | PCT | 16 |
2026-10-09 | Download |
|
A366U1UEUADZIF
Feature update
|
10 | XAA | 17 |
2026-10-03 | Download |
|
A366U1UEUADZIF
Feature update
|
10 | XAG | 17 |
2026-10-03 | Download |
|
A366U1UEUADZIF
Feature update
|
10 | USC | 17 |
2026-10-03 | Download |
|
A366U1UEUADZIF
Feature update
|
10 | CCT | 17 |
2026-10-03 | Download |
|
A366U1UEUADZIF
Feature update
|
10 | ATT | 17 |
2026-10-03 | Download |
|
A366U1UEUADZIF
Feature update
|
10 | ATC | 17 |
2026-10-03 | Download |
|
A366U1UEUADZIF
Feature update
|
10 | TMB | 17 |
2026-10-03 | Download |
|
A366U1UEUADZIF
Feature update
|
10 | AIO | 17 |
2026-10-03 | Download |
|
A366U1UEUADZIF
Feature update
|
10 | TFV | 17 |
2026-10-03 | Download |
|
A366U1UEUADZIF
Feature update
|
10 | TMK | 17 |
2026-10-03 | Download |
|
A366U1UEUADZIF
Feature update
|
10 | DSH | 17 |
2026-10-03 | Download |
|
A366U1UEUADZIF
Feature update
|
10 | DSA | 17 |
2026-10-03 | Download |
|
A366U1UEUADZIF
Feature update
|
10 | ACG | 17 |
2026-10-03 | Download |
|
A366U1UEUADZIF
Feature update
|
10 | CHA | 17 |
2026-10-03 | Download |
|
A366U1UEUADZIF
Feature update
|
10 | XAR | 17 |
2026-10-03 | Download |
|
A366U1UEUADZIF
Feature update
|
10 | FKR | 17 |
2026-10-03 | Download |
|
A366U1UEUADZIF
Feature update
|
10 | VZW | 17 |
2026-10-03 | Download |
|
A366U1UEUADZIF
Feature update
|
10 | LRA | 17 |
2026-10-03 | Download |
|
A366U1UEUADZIF
Feature update
|
10 | DSG | 17 |
2026-10-03 | Download |
Latest SM-A366U1 Firmware by Region
The newest build for each region (CSC) code. Not sure which region your phone uses? See the CSC code guide.
| Region | Latest build | Bit | Android | Date |
|---|---|---|---|---|
| ACG | A366U1UEUADZIF | 10 | 17 | 2026-10-03 |
| AIO | A366U1UEUADZIF | 10 | 17 | 2026-10-03 |
| ATC | A366U1UEUADZIF | 10 | 17 | 2026-10-03 |
| ATT | A366U1UEUADZIF | 10 | 17 | 2026-10-03 |
| CCT | A366U1UEUADZIF | 10 | 17 | 2026-10-03 |
| CHA | A366U1UEUADZIF | 10 | 17 | 2026-10-03 |
| DSA | A366U1UEUADZIF | 10 | 17 | 2026-10-03 |
| DSG | A366U1UEUADZIF | 10 | 17 | 2026-10-03 |
| DSH | A366U1UEUADZIF | 10 | 17 | 2026-10-03 |
| FKR | A366U1UEUADZIF | 10 | 17 | 2026-10-03 |
| LRA | A366U1UEUADZIF | 10 | 17 | 2026-10-03 |
| PCT | A366U1UESACZI1 | 10 | 16 | 2026-10-09 |
| TFV | A366U1UEUADZIF | 10 | 17 | 2026-10-03 |
| TMB | A366U1UEUADZIF | 10 | 17 | 2026-10-03 |
| TMK | A366U1UEUADZIF | 10 | 17 | 2026-10-03 |
| USC | A366U1UEUADZIF | 10 | 17 | 2026-10-03 |
| VZW | A366U1UEUADZIF | 10 | 17 | 2026-10-03 |
| XAA | A366U1UEUADZIF | 10 | 17 | 2026-10-03 |
| XAG | A366U1UEUADZIF | 10 | 17 | 2026-10-03 |
| XAR | A366U1UEUADZIF | 10 | 17 | 2026-10-03 |
How to Flash SM-A366U1 Firmware
Put the Samsung Galaxy A36 5G into Download Mode, load the BL, AP, CP and CSC files into Odin on a Windows PC and press Start. Pick a build with Bit 10 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.