G990USQSLIZA1 – Galaxy S21 FE 5G firmware

Build G990USQSLIZA1 is a security update for the Galaxy S21 FE 5G (SM-G990U) on Android 16 (One UI 8). It first appeared on Samsung's servers on Jan 28, 2026 (method) and has reached 9 regions so far. It raises the bootloader bit from 20 to 21: once installed, the device no longer accepts firmware with bit 20 or lower, so a downgrade to G990USQSKIYL1 is blocked. Samsung still serves this file.

Model
SM-G990U
Android
Android 16
Type
Security
Bootloader bit
21
First released
Jan 28, 2026
Regions
9

Rollout timeline by region

The date each region code (CSC) first received G990USQSLIZA1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
DSAUSAJan 28, 2026day 0G990USQSLIZA1/G990UOYNLIZA1/G990USQSLIZA1
DSHUSAJan 28, 2026day 0G990USQSLIZA1/G990UOYNLIZA1/G990USQSLIZA1
CCTUSA (Comcast)Jan 28, 2026day 0G990USQSLIZA1/G990UOYNLIZA1/G990USQSLIZA1
TMBUSA (T-Mobile)Jan 28, 2026day 0G990USQSLIZA1/G990UOYNLIZA1/G990USQSLIZA1
TMKUSA (MetroPCS)Jan 28, 2026day 0G990USQSLIZA1/G990UOYNLIZA1/G990USQSLIZA1
AIOUSA (Cricket)Jan 29, 2026+1 dayG990USQSLIZA1/G990UOYNLIZA1/G990USQSLIZA1
VZWUSA (Verizon)Jan 29, 2026+1 dayG990USQSLIZA1/G990UOYNLIZA1/G990USQSLIZA1
ATTUSA (AT&T)Jan 30, 2026+2 daysG990USQSLIZA1/G990UOYNLIZA1/G990USQSLIZA1
USCUSA (US Cellular)Feb 3, 2026+6 daysG990USQSLIZA1/G990UOYNLIZA1/G990USQSLIZA1

Download and release notes

samloader download -m SM-G990U -r DSA -v G990USQSLIZA1/G990UOYNLIZA1/G990USQSLIZA1

Samsung's release notes and security patch level for this update: SM-G990U / DSA on doc.samsungmobile.com. What each part of the build number means: decode G990USQSLIZA1.