A336NKSSEGZB2 – Galaxy A33 5G firmware
Build A336NKSSEGZB2 is a security update for the Galaxy A33 5G (SM-A336N)
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 13 to 14: once installed, the device no longer accepts firmware with bit 13 or lower, so a downgrade to A336NKSSDGZA1 is blocked. Samsung still serves this file.
- Model
- SM-A336N
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 14
- First released
- Mar 4, 2026
- Regions
- 4
Rollout timeline by region
The date each region code (CSC) first received A336NKSSEGZB2, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
KOO | South Korea | Mar 4, 2026 | day 0 | A336NKSSEGZB2/A336NOKREGZB2/A336NKOSEGZB1 |
KTC | South Korea (KT) | Mar 4, 2026 | day 0 | A336NKSSEGZB2/A336NOKREGZB2/A336NKOSEGZB1 |
LUC | South Korea (LG U+) | Mar 4, 2026 | day 0 | A336NKSSEGZB2/A336NOKREGZB2/A336NKOSEGZB1 |
SKC | South Korea (SKT) | Mar 4, 2026 | day 0 | A336NKSSEGZB2/A336NOKREGZB2/A336NKOSEGZB1 |
Download and release notes
samloader download -m SM-A336N -r KOO -v A336NKSSEGZB2/A336NOKREGZB2/A336NKOSEGZB1Samsung's release notes and security patch level for this update: SM-A336N / KOO on doc.samsungmobile.com. What each part of the build number means: decode A336NKSSEGZB2.