G990U3UESJIZA1 – Galaxy S21 FE 5G firmware
Build G990U3UESJIZA1 is a security update for the Galaxy S21 FE 5G (SM-G990U3)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Jan 29, 2026 (method) and has reached
14 regions so far. It raises the bootloader bit from 18 to 19: once installed, the device no longer accepts firmware with bit 18 or lower, so a downgrade to G990U3UESIIYL1 is blocked. Samsung still serves this file.
- Model
- SM-G990U3
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 19
- First released
- Jan 29, 2026
- Regions
- 14
Rollout timeline by region
The date each region code (CSC) first received G990U3UESJIZA1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
ACG | USA (C Spire) | Jan 29, 2026 | day 0 | G990U3UESJIZA1/G990U3OYMJIZA1/G990U3UESJIZA1 |
AIO | USA (Cricket) | Jan 29, 2026 | day 0 | G990U3UESJIZA1/G990U3OYMJIZA1/G990U3UESJIZA1 |
ATT | USA (AT&T) | Jan 29, 2026 | day 0 | G990U3UESJIZA1/G990U3OYMJIZA1/G990U3UESJIZA1 |
CCT | USA (Comcast) | Jan 29, 2026 | day 0 | G990U3UESJIZA1/G990U3OYMJIZA1/G990U3UESJIZA1 |
DSA | USA | Jan 29, 2026 | day 0 | G990U3UESJIZA1/G990U3OYMJIZA1/G990U3UESJIZA1 |
DSH | USA | Jan 29, 2026 | day 0 | G990U3UESJIZA1/G990U3OYMJIZA1/G990U3UESJIZA1 |
LRA | USA (Bluegrass) | Jan 29, 2026 | day 0 | G990U3UESJIZA1/G990U3OYMJIZA1/G990U3UESJIZA1 |
TFN | USA (TracFone) | Jan 29, 2026 | day 0 | G990U3UESJIZA1/G990U3OYMJIZA1/G990U3UESJIZA1 |
TMB | USA (T-Mobile) | Jan 29, 2026 | day 0 | G990U3UESJIZA1/G990U3OYMJIZA1/G990U3UESJIZA1 |
TMK | USA (MetroPCS) | Jan 29, 2026 | day 0 | G990U3UESJIZA1/G990U3OYMJIZA1/G990U3UESJIZA1 |
USC | USA (US Cellular) | Jan 29, 2026 | day 0 | G990U3UESJIZA1/G990U3OYMJIZA1/G990U3UESJIZA1 |
VZW | USA (Verizon) | Jan 29, 2026 | day 0 | G990U3UESJIZA1/G990U3OYMJIZA1/G990U3UESJIZA1 |
XAA | USA (unlocked) | Jan 29, 2026 | day 0 | G990U3UESJIZA1/G990U3OYMJIZA1/G990U3UESJIZA1 |
XAR | USA (Cellular South) | Jan 29, 2026 | day 0 | G990U3UESJIZA1/G990U3OYMJIZA1/G990U3UESJIZA1 |
Download and release notes
samloader download -m SM-G990U3 -r XAA -v G990U3UESJIZA1/G990U3OYMJIZA1/G990U3UESJIZA1Samsung's release notes and security patch level for this update: SM-G990U3 / XAA on doc.samsungmobile.com. What each part of the build number means: decode G990U3UESJIZA1.