A266BXXSBCZG4 – Galaxy A26 5G firmware
Build A266BXXSBCZG4 is a security update for the Galaxy A26 5G (SM-A266B)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Jul 30, 2026 (method) and has reached
4 regions so far. It keeps bootloader bit 11, so downgrading to the previous build A266BXXSBCZG2 is still possible. Samsung still serves this file.
- Model
- SM-A266B
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 11
- First released
- Jul 30, 2026
- Regions
- 4
Rollout timeline by region
The date each region code (CSC) first received A266BXXSBCZG4, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
BKD | Bangladesh | Jul 30, 2026 | day 0 | A266BXXSBCZG4/A266BODMBCZG4/A266BXXSBCZG2 |
INS | India | Jul 30, 2026 | day 0 | A266BXXSBCZG4/A266BODMBCZG4/A266BXXSBCZG2 |
NPB | Nepal | Jul 30, 2026 | day 0 | A266BXXSBCZG4/A266BODMBCZG4/A266BXXSBCZG2 |
SLK | Sri Lanka | Jul 30, 2026 | day 0 | A266BXXSBCZG4/A266BODMBCZG4/A266BXXSBCZG2 |
Download and release notes
samloader download -m SM-A266B -r INS -v A266BXXSBCZG4/A266BODMBCZG4/A266BXXSBCZG2Samsung's release notes and security patch level for this update: SM-A266B / INS on doc.samsungmobile.com. What each part of the build number means: decode A266BXXSBCZG4.