A356NKSS8CZB3 – Galaxy A35 5G firmware
Build A356NKSS8CZB3 is a security update for the Galaxy A35 5G (SM-A356N)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Mar 4, 2026 (method) and has reached
4 regions so far. It raises the bootloader bit from 7 to 8: once installed, the device no longer accepts firmware with bit 7 or lower, so a downgrade to A356NKSS7CZA1 is blocked. Samsung still serves this file.
- Model
- SM-A356N
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 8
- First released
- Mar 4, 2026
- Regions
- 4
Rollout timeline by region
The date each region code (CSC) first received A356NKSS8CZB3, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
KOO | South Korea | Mar 4, 2026 | day 0 | A356NKSS8CZB3/A356NOKR8CZB3/A356NKOS8CZB1 |
KTC | South Korea (KT) | Mar 4, 2026 | day 0 | A356NKSS8CZB3/A356NOKR8CZB3/A356NKOS8CZB1 |
LUC | South Korea (LG U+) | Mar 4, 2026 | day 0 | A356NKSS8CZB3/A356NOKR8CZB3/A356NKOS8CZB1 |
SKC | South Korea (SKT) | Mar 4, 2026 | day 0 | A356NKSS8CZB3/A356NOKR8CZB3/A356NKOS8CZB1 |
Download and release notes
samloader download -m SM-A356N -r KOO -v A356NKSS8CZB3/A356NOKR8CZB3/A356NKOS8CZB1Samsung's release notes and security patch level for this update: SM-A356N / KOO on doc.samsungmobile.com. What each part of the build number means: decode A356NKSS8CZB3.