Samsung Galaxy A26 5G (SM-A266M) Firmware Overview
What is the latest SM-A266M firmware?
A266MUBSCCZJ1, released October 12, 2026 with Android 16. It is a security update on bootloader binary 12. 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 A26 5G still getting updates?
Yes. The newest build is from October 2026, and 17 of 20 regions already have a build from that month; the rest usually follow within a few weeks.
Can I downgrade the SM-A266M firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. In the archive the binary of this model rose from 11 to 12:
- Binary 12 — since Oct 2026
- Binary 11 — since Aug 2026
A phone already on binary 12 rejects builds with a lower binary in Odin ("SW REV CHECK FAIL"), so it can go back to an earlier Android version only if that version has a binary 12 build. How to read a build number.
All SM-A266M firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
A266MUBSCCZJ1
Security update
|
12 | TCE | 16 |
2026-10-12 | Download |
|
A266MUBSCCZJ1
Security update
|
12 | ZVV | 16 |
2026-10-12 | Download |
|
A266MUBSCCZJ1
Security update
|
12 | ZTA | 16 |
2026-10-12 | Download |
|
A266MUBSCCZJ1
Security update
|
12 | PGU | 16 |
2026-10-12 | Download |
|
A266MUBSCCZJ1
Security update
|
12 | ZTM | 16 |
2026-10-12 | Download |
|
A266MUBSCCZJ1
Security update
|
12 | TPA | 16 |
2026-10-12 | Download |
|
A266MUBSCCZJ1
Security update
|
12 | COM | 16 |
2026-10-12 | Download |
|
A266MUBSCCZJ1
Security update
|
12 | CGU | 16 |
2026-10-12 | Download |
|
A266MUBSCCZJ1
Security update
|
12 | ZTO | 16 |
2026-10-12 | Download |
|
A266MUBSCCZJ1
Security update
|
12 | BVO | 16 |
2026-10-12 | Download |
|
A266MUBSCCZJ1
Security update
|
12 | CDR | 16 |
2026-10-12 | Download |
|
A266MUBSCCZJ1
Security update
|
12 | MXO | 16 |
2026-10-12 | Download |
|
A266MUBSCCZJ1
Security update
|
12 | GTO | 16 |
2026-10-12 | Download |
|
A266MUBSCCZJ1
Security update
|
12 | SAM | 16 |
2026-10-12 | Download |
|
A266MUBSCCZJ1
Security update
|
12 | PET | 16 |
2026-10-12 | Download |
|
A266MUBSCCZJ1
Security update
|
12 | PEO | 16 |
2026-10-12 | Download |
|
A266MUBSCCZJ1
Security update
|
12 | PNT | 16 |
2026-10-12 | Download |
|
A266MUBSBCZH1
Security update
|
11 | ECO | 16 |
2026-08-18 | Download |
|
A266MUBSBCZH1
Security update
|
11 | CHL | 16 |
2026-08-18 | Download |
|
A266MUBSBCZH1
Security update
|
11 | EON | 16 |
2026-08-18 | Download |
Latest SM-A266M 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 |
|---|---|---|---|---|
| BVO | A266MUBSCCZJ1 | 12 | 16 | 2026-10-12 |
| CDR | A266MUBSCCZJ1 | 12 | 16 | 2026-10-12 |
| CGU | A266MUBSCCZJ1 | 12 | 16 | 2026-10-12 |
| CHL | A266MUBSBCZH1 | 11 | 16 | 2026-08-18 |
| COM | A266MUBSCCZJ1 | 12 | 16 | 2026-10-12 |
| ECO | A266MUBSBCZH1 | 11 | 16 | 2026-08-18 |
| EON | A266MUBSBCZH1 | 11 | 16 | 2026-08-18 |
| GTO | A266MUBSCCZJ1 | 12 | 16 | 2026-10-12 |
| MXO | A266MUBSCCZJ1 | 12 | 16 | 2026-10-12 |
| PEO | A266MUBSCCZJ1 | 12 | 16 | 2026-10-12 |
| PET | A266MUBSCCZJ1 | 12 | 16 | 2026-10-12 |
| PGU | A266MUBSCCZJ1 | 12 | 16 | 2026-10-12 |
| PNT | A266MUBSCCZJ1 | 12 | 16 | 2026-10-12 |
| SAM | A266MUBSCCZJ1 | 12 | 16 | 2026-10-12 |
| TCE | A266MUBSCCZJ1 | 12 | 16 | 2026-10-12 |
| TPA | A266MUBSCCZJ1 | 12 | 16 | 2026-10-12 |
| ZTA | A266MUBSCCZJ1 | 12 | 16 | 2026-10-12 |
| ZTM | A266MUBSCCZJ1 | 12 | 16 | 2026-10-12 |
| ZTO | A266MUBSCCZJ1 | 12 | 16 | 2026-10-12 |
| ZVV | A266MUBSCCZJ1 | 12 | 16 | 2026-10-12 |
How to Flash SM-A266M Firmware
Put the Samsung Galaxy A26 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 12 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.