A556SKSSBDZI1 – Galaxy Quantum5 firmware
Build A556SKSSBDZI1 is a security update for the Galaxy Quantum5 (SM-A556S)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Sep 16, 2026 (method) and has reached
1 region so far. It raises the bootloader bit from 10 to 11: once installed, the device no longer accepts firmware with bit 10 or lower, so a downgrade to A556SKSSADZH3 is blocked. Samsung still serves this file.
- Model
- SM-A556S
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 11
- First released
- Sep 16, 2026
- Regions
- 1
Rollout timeline by region
The date each region code (CSC) first received A556SKSSBDZI1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
SKC | South Korea (SKT) | Sep 16, 2026 | day 0 | A556SKSSBDZI1/A556SSKCBDZI1/A556SKSSBDZI1 |
Download and release notes
samloader download -m SM-A556S -r SKC -v A556SKSSBDZI1/A556SSKCBDZI1/A556SKSSBDZI1Samsung's release notes and security patch level for this update: SM-A556S / SKC on doc.samsungmobile.com. What each part of the build number means: decode A556SKSSBDZI1.