S921NKSUIEZJD – Galaxy S24 firmware
Build S921NKSUIEZJD is a feature update for the Galaxy S24 (SM-S921N)
on Android 17 (One UI 9). It first appeared on Samsung's servers on Nov 9, 2026 (method) and has reached
4 regions so far. It keeps bootloader bit 18, so downgrading to the previous build S921NKSSIEZJ1 is still possible. Samsung still serves this file.
- Model
- SM-S921N
- Android
- Android 17
- Type
- Feature
- Bootloader bit
- 18
- First released
- Nov 9, 2026
- Regions
- 4
Rollout timeline by region
The date each region code (CSC) first received S921NKSUIEZJD, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
KOO | South Korea | Nov 9, 2026 | day 0 | S921NKSUIEZJD/S921NOKRIEZJD/S921NKSSIEZJ1 |
KTC | South Korea (KT) | Nov 9, 2026 | day 0 | S921NKSUIEZJD/S921NOKRIEZJD/S921NKSSIEZJ1 |
LUC | South Korea (LG U+) | Nov 9, 2026 | day 0 | S921NKSUIEZJD/S921NOKRIEZJD/S921NKSSIEZJ1 |
SKC | South Korea (SKT) | Nov 9, 2026 | day 0 | S921NKSUIEZJD/S921NOKRIEZJD/S921NKSSIEZJ1 |
Download and release notes
samloader download -m SM-S921N -r KOO -v S921NKSUIEZJD/S921NOKRIEZJD/S921NKSSIEZJ1Samsung's release notes and security patch level for this update: SM-S921N / KOO on doc.samsungmobile.com. What each part of the build number means: decode S921NKSUIEZJD.