A536NKSSFGZB2 – Galaxy A53 5G firmware
Build A536NKSSFGZB2 is a security update for the Galaxy A53 5G (SM-A536N)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Feb 25, 2026 (method) and has reached
4 regions so far. It raises the bootloader bit from 14 to 15: once installed, the device no longer accepts firmware with bit 14 or lower, so a downgrade to A536NKSSEGZA1 is blocked. Samsung still serves this file.
- Model
- SM-A536N
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 15
- First released
- Feb 25, 2026
- Regions
- 4
Rollout timeline by region
The date each region code (CSC) first received A536NKSSFGZB2, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
KOO | South Korea | Feb 25, 2026 | day 0 | A536NKSSFGZB2/A536NOKRFGZB2/A536NKOSFGZB1 |
KTC | South Korea (KT) | Feb 25, 2026 | day 0 | A536NKSSFGZB2/A536NOKRFGZB2/A536NKOSFGZB1 |
LUC | South Korea (LG U+) | Feb 25, 2026 | day 0 | A536NKSSFGZB2/A536NOKRFGZB2/A536NKOSFGZB1 |
SKC | South Korea (SKT) | Feb 25, 2026 | day 0 | A536NKSSFGZB2/A536NOKRFGZB2/A536NKOSFGZB1 |
Download and release notes
samloader download -m SM-A536N -r KOO -v A536NKSSFGZB2/A536NOKRFGZB2/A536NKOSFGZB1Samsung's release notes and security patch level for this update: SM-A536N / KOO on doc.samsungmobile.com. What each part of the build number means: decode A536NKSSFGZB2.