A546SKSSKFZI1 – Galaxy A54 5G firmware
Build A546SKSSKFZI1 is a security update for the Galaxy A54 5G (SM-A546S)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Sep 21, 2026 (method) and has reached
1 region so far. It raises the bootloader bit from 19 to 20: once installed, the device no longer accepts firmware with bit 19 or lower, so a downgrade to A546SKSSJFZH3 is blocked. Samsung still serves this file.
- Model
- SM-A546S
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 20
- First released
- Sep 21, 2026
- Regions
- 1
Rollout timeline by region
The date each region code (CSC) first received A546SKSSKFZI1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
SKC | South Korea (SKT) | Sep 21, 2026 | day 0 | A546SKSSKFZI1/A546SSKCKFZI1/A546SKSSKFZI1 |
Download and release notes
samloader download -m SM-A546S -r SKC -v A546SKSSKFZI1/A546SSKCKFZI1/A546SKSSKFZI1Samsung's release notes and security patch level for this update: SM-A546S / SKC on doc.samsungmobile.com. What each part of the build number means: decode A546SKSSKFZI1.