A266USQS7BZB6 – Galaxy A26 5G firmware
Build A266USQS7BZB6 is a security update for the Galaxy A26 5G (SM-A266U)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Mar 15, 2026 (method) and has reached
2 regions so far. It raises the bootloader bit from 6 to 7: once installed, the device no longer accepts firmware with bit 6 or lower, so a downgrade to A266USQS6BZA2 is blocked. Samsung still serves this file.
- Model
- SM-A266U
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 7
- First released
- Mar 15, 2026
- Regions
- 2
Rollout timeline by region
The date each region code (CSC) first received A266USQS7BZB6, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
CCT | USA (Comcast) | Mar 15, 2026 | day 0 | A266USQS7BZB6/A266UOYN7BZB6/A266USQS7BZB6 |
USC | USA (US Cellular) | Mar 19, 2026 | +4 days | A266USQS7BZB6/A266UOYN7BZB6/A266USQS7BZB6 |
Download and release notes
samloader download -m SM-A266U -r CCT -v A266USQS7BZB6/A266UOYN7BZB6/A266USQS7BZB6Samsung's release notes and security patch level for this update: SM-A266U / CCT on doc.samsungmobile.com. What each part of the build number means: decode A266USQS7BZB6.