Galaxy A26 5G SM-A266M firmware
The latest stable build is A266MUBUCDZJ5 (Android 17, feature update), first released on Nov 4, 2026 – 2 days ago. Samsung has published 16 stable builds for this model since Mar 10, 2025: 11 security and 5 feature updates, from Android 15 to Android 17. The current bootloader (binary) version is 12. A device on bit 12 only accepts firmware with bit 12 or higher – see downgrading and the bootloader bit.
- Latest build
A266MUBUCDZJ5- Released
- Nov 4, 2026
- Android
- Android 17
- Bootloader bit
- 12
- Regions
- 36
- Stable builds
- 16
Latest firmware by region (CSC)
Samsung builds firmware per region code (CSC). Pick the code that matches your device – it is shown under Settings › About phone › Software information › Service provider software version. Follow a code for its complete history.
| CSC | Region | Latest build | Android | Released | Builds |
|---|---|---|---|---|---|
ARO | Argentina | A266MUBSBCZH1 | Android 16 | Sep 9, 2026 | 14 |
BVO | Bolivia | A266MUBSCCZJ1 | Android 16 | Oct 27, 2026 | 15 |
CDR | Dominican Republic | A266MUBSCCZJ1 | Android 16 | Oct 20, 2026 | 15 |
CGU | Guatemala (Claro) | A266MUBSCCZJ1 | Android 16 | Oct 27, 2026 | 15 |
CHE | Chile (Entel) | A266MUBSBCZH1 | Android 16 | Sep 17, 2026 | 14 |
CHL | Chile (Claro) | A266MUBSBCZH1 | Android 16 | Sep 17, 2026 | 14 |
CHO | Chile | A266MUBSBCZH1 | Android 16 | Sep 17, 2026 | 14 |
CHT | Chile (Movistar) | A266MUBSBCZH1 | Android 16 | Sep 17, 2026 | 14 |
COB | Colombia (Movistar) | A266MUBSBCZH1 | Android 16 | Sep 9, 2026 | 14 |
COL | Colombia | A266MUBSBCZH1 | Android 16 | Sep 9, 2026 | 14 |
COM | Colombia (Claro) | A266MUBSCCZJ1 | Android 16 | Oct 20, 2026 | 15 |
COO | Colombia | A266MUBSBCZH1 | Android 16 | Sep 9, 2026 | 14 |
CRC | Costa Rica | A266MUBSBCZH1 | Android 16 | Sep 10, 2026 | 14 |
CTI | Argentina (Claro) | A266MUBSBCZH1 | Android 16 | Sep 9, 2026 | 14 |
DOR | Dominican Republic | A266MUBSBCZH1 | Android 16 | Sep 10, 2026 | 14 |
EBE | Ecuador | A266MUBSBCZH1 | Android 16 | Sep 17, 2026 | 14 |
ECO | Ecuador | A266MUBSBCZH1 | Android 16 | Sep 17, 2026 | 14 |
GLO | Nigeria (Glo) | A266MUBSBCZH1 | Android 16 | Sep 10, 2026 | 14 |
GTO | Guatemala | A266MUBUCDZJ5 | Android 17 | Nov 4, 2026 | 16 |
MXO | Mexico | A266MUBSCCZJ1 | Android 16 | Oct 27, 2026 | 15 |
PEO | Peru | A266MUBSCCZJ1 | Android 16 | Oct 22, 2026 | 15 |
PET | Peru (Movistar) | A266MUBSCCZJ1 | Android 16 | Oct 22, 2026 | 15 |
PGU | Guatemala | A266MUBSCCZJ1 | Android 16 | Oct 20, 2026 | 15 |
PNT | Panama | A266MUBSCCZJ1 | Android 16 | Oct 22, 2026 | 15 |
PSN | Argentina (Personal) | A266MUBSBCZH1 | Android 16 | Sep 9, 2026 | 14 |
SAM | Oceania | A266MUBSCCZJ1 | Android 16 | Oct 22, 2026 | 15 |
TCE | Mexico (Telcel) | A266MUBSCCZJ1 | Android 16 | Oct 20, 2026 | 13 |
TGP | Paraguay | A266MUBSBCZH1 | Android 16 | Sep 9, 2026 | 14 |
TPA | Panama | A266MUBSCCZJ1 | Android 16 | Oct 27, 2026 | 15 |
UFN | Argentina (Movistar) | A266MUBSBCZH1 | Android 16 | Sep 9, 2026 | 14 |
UPO | Uruguay | A266MUBSBCZH1 | Android 16 | Sep 9, 2026 | 14 |
UYO | Uruguay | A266MUBSBCZH1 | Android 16 | Sep 9, 2026 | 14 |
ZTA | Brazil (Claro) | A266MUBSCCZJ1 | Android 16 | Oct 20, 2026 | 15 |
ZTM | Brazil (TIM) | A266MUBSCCZJ1 | Android 16 | Oct 20, 2026 | 15 |
ZTO | Brazil | A266MUBSCCZJ1 | Android 16 | Oct 20, 2026 | 15 |
ZVV | Brazil (Vivo) | A266MUBSCCZJ1 | Android 16 | Oct 20, 2026 | 15 |
Firmware history (16 builds)
Every stable build (PDA version) Samsung has published for the SM-A266M, newest first. “” is the earliest date the build appeared on Samsung's servers in any region. “” means Samsung no longer serves the file for that build.
| Build (PDA) | Released | Android | Type | Bit | Regions | File |
|---|---|---|---|---|---|---|
A266MUBUCDZJ5 | Nov 4, 2026 | Android 17 | Feature | 12 | 1 | on server |
A266MUBSCCZJ1 | Oct 19, 2026 | Android 16 | Security | 12 | 17 | on server |
A266MUBSBCZH1 | Aug 26, 2026 | Android 16 | Security | 11 | 36 | on server |
A266MUBSACZG1 | Jul 20, 2026 | Android 16 | Security | 10 | 36 | on server |
A266MUBU9CZEA | May 25, 2026 | Android 16 | Feature | 9 | 36 | on server |
A266MUBS9BZD2 | Apr 12, 2026 | Android 16 | Security | 9 | 36 | on server |
A266MUBS8BZB6 | Mar 3, 2026 | Android 16 | Security | 8 | 36 | on server |
A266MUBS7BZA3 | Jan 19, 2026 | Android 16 | Security | 7 | 36 | on server |
A266MUBS6BYL1 | Dec 22, 2025 | Android 16 | Security | 6 | 36 | on server |
A266MUBS5BYK3 | Nov 23, 2025 | Android 16 | Security | 5 | 36 | on server |
A266MUBU4BYI3 | Oct 1, 2025 | Android 16 | Feature | 4 | 36 | on server |
A266MUBS4AYH3 | Aug 13, 2025 | Android 15 | Security | 4 | 36 | on server |
A266MUBS3AYE3 | Jun 10, 2025 | Android 15 | Security | 3 | 36 | on server |
A266MUBU2AYE1 | May 12, 2025 | Android 15 | Feature | 2 | 36 | on server |
A266MUBS2AYC1 | Apr 15, 2025 | Android 15 | Security | 2 | 35 | on server |
A266MUBU1AYB8 | Mar 10, 2025 | Android 15 | Feature | 1 | 35 | on server |
How to download SM-A266M firmware
We do not host firmware. Download it directly from Samsung's servers with a free open-source tool, for example samloader:
samloader download -m SM-A266M -r GTOReplace GTO with your region code. Step-by-step instructions, including a graphical alternative:
How to download Samsung firmware.
Changelog and security patch level
Samsung publishes the release notes for each update, including the security patch level, on its own site. They are listed per region – for example SM-A266M / GTO release notes on doc.samsungmobile.com. Each region page here links to the notes for that code.