A576USQS3AZH9 – Galaxy A57 5G firmware
Build A576USQS3AZH9 is a security update for the Galaxy A57 5G (SM-A576U)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Aug 26, 2026 (method) and has reached
2 regions so far. It raises the bootloader bit from 2 to 3: once installed, the device no longer accepts firmware with bit 2 or lower, so a downgrade to A576USQS2AZG3 is blocked. Samsung still serves this file.
- Model
- SM-A576U
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 3
- First released
- Aug 26, 2026
- Regions
- 2
Rollout timeline by region
The date each region code (CSC) first received A576USQS3AZH9, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
TMB | USA (T-Mobile) | Aug 26, 2026 | day 0 | A576USQS3AZH9/A576UOYN3AZH9/A576USQS3AZH9 |
TMK | USA (MetroPCS) | Aug 26, 2026 | day 0 | A576USQS3AZH9/A576UOYN3AZH9/A576USQS3AZH9 |
Download and release notes
samloader download -m SM-A576U -r TMB -v A576USQS3AZH9/A576UOYN3AZH9/A576USQS3AZH9Samsung's release notes and security patch level for this update: SM-A576U / TMB on doc.samsungmobile.com. What each part of the build number means: decode A576USQS3AZH9.