S921USQS6DZG1 – Galaxy S24 firmware
Build S921USQS6DZG1 is a security update for the Galaxy S24 (SM-S921U)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Jul 22, 2026 (method) and has reached
10 regions so far. It keeps bootloader bit 6, so downgrading to the previous build S921USQS6DZF2 is still possible. Samsung still serves this file.
- Model
- SM-S921U
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 6
- First released
- Jul 22, 2026
- Regions
- 10
Rollout timeline by region
The date each region code (CSC) first received S921USQS6DZG1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
DSA | USA | Jul 22, 2026 | day 0 | S921USQS6DZG1/S921UOYN6DZG1/S921USQS6DZG1 |
DSH | USA | Jul 22, 2026 | day 0 | S921USQS6DZG1/S921UOYN6DZG1/S921USQS6DZG1 |
TMB | USA (T-Mobile) | Jul 22, 2026 | day 0 | S921USQS6DZG1/S921UOYN6DZG1/S921USQS6DZG1 |
TMK | USA (MetroPCS) | Jul 22, 2026 | day 0 | S921USQS6DZG1/S921UOYN6DZG1/S921USQS6DZG1 |
VZW | USA (Verizon) | Jul 22, 2026 | day 0 | S921USQS6DZG1/S921UOYN6DZG1/S921USQS6DZG1 |
AIO | USA (Cricket) | Jul 23, 2026 | +1 day | S921USQS6DZG1/S921UOYN6DZG1/S921USQS6DZG1 |
ATT | USA (AT&T) | Jul 23, 2026 | +1 day | S921USQS6DZG1/S921UOYN6DZG1/S921USQS6DZG1 |
CCT | USA (Comcast) | Jul 23, 2026 | +1 day | S921USQS6DZG1/S921UOYN6DZG1/S921USQS6DZG1 |
XAA | USA (unlocked) | Jul 23, 2026 | +1 day | S921USQS6DZG1/S921UOYN6DZG1/S921USQS6DZG1 |
USC | USA (US Cellular) | Jul 28, 2026 | +6 days | S921USQS6DZG1/S921UOYN6DZG1/S921USQS6DZG1 |
Download and release notes
samloader download -m SM-S921U -r XAA -v S921USQS6DZG1/S921UOYN6DZG1/S921USQS6DZG1Samsung's release notes and security patch level for this update: SM-S921U / XAA on doc.samsungmobile.com. What each part of the build number means: decode S921USQS6DZG1.