G990USQSNIZE3 – Galaxy S21 FE 5G firmware

Build G990USQSNIZE3 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 Jun 1, 2026 (method) and has reached 9 regions so far. It raises the bootloader bit from 22 to 23: once installed, the device no longer accepts firmware with bit 22 or lower, so a downgrade to G990USQSMIZB2 is blocked. Samsung still serves this file.

Model
SM-G990U
Android
Android 16
Type
Security
Bootloader bit
23
First released
Jun 1, 2026
Regions
9

Rollout timeline by region

The date each region code (CSC) first received G990USQSNIZE3, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
AIOUSA (Cricket)Jun 1, 2026day 0G990USQSNIZE3/G990UOYNNIZE3/G990USQSNIZE3
ATTUSA (AT&T)Jun 1, 2026day 0G990USQSNIZE3/G990UOYNNIZE3/G990USQSNIZE3
DSAUSAJun 2, 2026+1 dayG990USQSNIZE3/G990UOYNNIZE3/G990USQSNIZE3
DSHUSAJun 2, 2026+1 dayG990USQSNIZE3/G990UOYNNIZE3/G990USQSNIZE3
VZWUSA (Verizon)Jun 2, 2026+1 dayG990USQSNIZE3/G990UOYNNIZE3/G990USQSNIZE3
TMBUSA (T-Mobile)Jun 3, 2026+2 daysG990USQSNIZE3/G990UOYNNIZE3/G990USQSNIZE3
TMKUSA (MetroPCS)Jun 3, 2026+2 daysG990USQSNIZE3/G990UOYNNIZE3/G990USQSNIZE3
CCTUSA (Comcast)Jun 3, 2026+2 daysG990USQSNIZE3/G990UOYNNIZE3/G990USQSNIZE3
USCUSA (US Cellular)Jun 8, 2026+7 daysG990USQSNIZE3/G990UOYNNIZE3/G990USQSNIZE3

Download and release notes

samloader download -m SM-G990U -r AIO -v G990USQSNIZE3/G990UOYNNIZE3/G990USQSNIZE3

Samsung's release notes and security patch level for this update: SM-G990U / AIO on doc.samsungmobile.com. What each part of the build number means: decode G990USQSNIZE3.