G996U1UESIHYL1 – Galaxy S21+ 5G firmware

Build G996U1UESIHYL1 is a security update for the Galaxy S21+ 5G (SM-G996U1) on Android 15 (One UI 7). It first appeared on Samsung's servers on Dec 17, 2025 (method) and has reached 15 regions so far. It raises the bootloader bit from 17 to 18: once installed, the device no longer accepts firmware with bit 17 or lower, so a downgrade to G996U1UESHHYI2 is blocked. Samsung still serves this file.

Model
SM-G996U1
Android
Android 15
Type
Security
Bootloader bit
18
First released
Dec 17, 2025
Regions
15

Rollout timeline by region

The date each region code (CSC) first received G996U1UESIHYL1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Dec 17, 2025day 0G996U1UESIHYL1/G996U1OYMIHYL1/G996U1UESIHYL1
AIOUSA (Cricket)Dec 17, 2025day 0G996U1UESIHYL1/G996U1OYMIHYL1/G996U1UESIHYL1
ATTUSA (AT&T)Dec 17, 2025day 0G996U1UESIHYL1/G996U1OYMIHYL1/G996U1UESIHYL1
CCTUSA (Comcast)Dec 17, 2025day 0G996U1UESIHYL1/G996U1OYMIHYL1/G996U1UESIHYL1
DSHUSADec 17, 2025day 0G996U1UESIHYL1/G996U1OYMIHYL1/G996U1UESIHYL1
LRAUSA (Bluegrass)Dec 17, 2025day 0G996U1UESIHYL1/G996U1OYMIHYL1/G996U1UESIHYL1
SPRUSA (Sprint)Dec 17, 2025day 0G996U1UESIHYL1/G996U1OYMIHYL1/G996U1UESIHYL1
TFNUSA (TracFone)Dec 17, 2025day 0G996U1UESIHYL1/G996U1OYMIHYL1/G996U1UESIHYL1
TMBUSA (T-Mobile)Dec 17, 2025day 0G996U1UESIHYL1/G996U1OYMIHYL1/G996U1UESIHYL1
TMKUSA (MetroPCS)Dec 17, 2025day 0G996U1UESIHYL1/G996U1OYMIHYL1/G996U1UESIHYL1
USCUSA (US Cellular)Dec 17, 2025day 0G996U1UESIHYL1/G996U1OYMIHYL1/G996U1UESIHYL1
VZWUSA (Verizon)Dec 17, 2025day 0G996U1UESIHYL1/G996U1OYMIHYL1/G996U1UESIHYL1
XAAUSA (unlocked)Dec 17, 2025day 0G996U1UESIHYL1/G996U1OYMIHYL1/G996U1UESIHYL1
XARUSA (Cellular South)Dec 17, 2025day 0G996U1UESIHYL1/G996U1OYMIHYL1/G996U1UESIHYL1
XASUSA (Sprint)Dec 17, 2025day 0G996U1UESIHYL1/G996U1OYMIHYL1/G996U1UESIHYL1

Download and release notes

samloader download -m SM-G996U1 -r XAA -v G996U1UESIHYL1/G996U1OYMIHYL1/G996U1UESIHYL1

Samsung's release notes and security patch level for this update: SM-G996U1 / XAA on doc.samsungmobile.com. What each part of the build number means: decode G996U1UESIHYL1.