G981NKSS8IYC2 – Galaxy S20 5G firmware
Build G981NKSS8IYC2 is a security update for the Galaxy S20 5G (SM-G981N)
on Android 13 (One UI 5). It first appeared on Samsung's servers on Mar 26, 2025 (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 G981NKSS7IYA1 is blocked. Samsung still serves this file.
- Model
- SM-G981N
- Android
- Android 13
- Type
- Security
- Bootloader bit
- 8
- First released
- Mar 26, 2025
- Regions
- 4
Rollout timeline by region
The date each region code (CSC) first received G981NKSS8IYC2, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
KOO | South Korea | Mar 26, 2025 | day 0 | G981NKSS8IYC2/G981NOKR8IYC2/G981NKSS8IYC2 |
KTC | South Korea (KT) | Mar 26, 2025 | day 0 | G981NKSS8IYC2/G981NOKR8IYC2/G981NKSS8IYC2 |
LUC | South Korea (LG U+) | Mar 26, 2025 | day 0 | G981NKSS8IYC2/G981NOKR8IYC2/G981NKSS8IYC2 |
SKC | South Korea (SKT) | Mar 26, 2025 | day 0 | G981NKSS8IYC2/G981NOKR8IYC2/G981NKSS8IYC2 |
Download and release notes
samloader download -m SM-G981N -r KOO -v G981NKSS8IYC2/G981NOKR8IYC2/G981NKSS8IYC2Samsung's release notes and security patch level for this update: SM-G981N / KOO on doc.samsungmobile.com. What each part of the build number means: decode G981NKSS8IYC2.