A266USQUADZJ5 – Galaxy A26 5G firmware
Build A266USQUADZJ5 is a feature update for the Galaxy A26 5G (SM-A266U)
on Android 17 (One UI 9). It first appeared on Samsung's servers on Oct 26, 2026 (method) and has reached
1 region so far. It keeps bootloader bit 10, so downgrading to the previous build A266USQSACZH3 is still possible. Samsung still serves this file.
- Model
- SM-A266U
- Android
- Android 17
- Type
- Feature
- Bootloader bit
- 10
- First released
- Oct 26, 2026
- Regions
- 1
Not yet released in 1 regions that are still on an older build: CCT.
Rollout timeline by region
The date each region code (CSC) first received A266USQUADZJ5, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
USC | USA (US Cellular) | Oct 26, 2026 | day 0 | A266USQUADZJ5/A266UOYNADZJ5/A266USQUADZJ5 |
Download and release notes
samloader download -m SM-A266U -r USC -v A266USQUADZJ5/A266UOYNADZJ5/A266USQUADZJ5Samsung's release notes and security patch level for this update: SM-A266U / USC on doc.samsungmobile.com. What each part of the build number means: decode A266USQUADZJ5.