G996U1UESJHZAA – Galaxy S21+ 5G firmware

Build G996U1UESJHZAA 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 Jan 28, 2026 (method) and has reached 15 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 G996U1UESIHYL1 is blocked. Samsung still serves this file.

Model
SM-G996U1
Android
Android 15
Type
Security
Bootloader bit
19
First released
Jan 28, 2026
Regions
15

Rollout timeline by region

The date each region code (CSC) first received G996U1UESJHZAA, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Jan 28, 2026day 0G996U1UESJHZAA/G996U1OYMJHZAA/G996U1UESJHZAA
AIOUSA (Cricket)Jan 28, 2026day 0G996U1UESJHZAA/G996U1OYMJHZAA/G996U1UESJHZAA
ATTUSA (AT&T)Jan 28, 2026day 0G996U1UESJHZAA/G996U1OYMJHZAA/G996U1UESJHZAA
CCTUSA (Comcast)Jan 28, 2026day 0G996U1UESJHZAA/G996U1OYMJHZAA/G996U1UESJHZAA
DSHUSAJan 28, 2026day 0G996U1UESJHZAA/G996U1OYMJHZAA/G996U1UESJHZAA
LRAUSA (Bluegrass)Jan 28, 2026day 0G996U1UESJHZAA/G996U1OYMJHZAA/G996U1UESJHZAA
SPRUSA (Sprint)Jan 28, 2026day 0G996U1UESJHZAA/G996U1OYMJHZAA/G996U1UESJHZAA
TFNUSA (TracFone)Jan 28, 2026day 0G996U1UESJHZAA/G996U1OYMJHZAA/G996U1UESJHZAA
TMBUSA (T-Mobile)Jan 28, 2026day 0G996U1UESJHZAA/G996U1OYMJHZAA/G996U1UESJHZAA
TMKUSA (MetroPCS)Jan 28, 2026day 0G996U1UESJHZAA/G996U1OYMJHZAA/G996U1UESJHZAA
USCUSA (US Cellular)Jan 28, 2026day 0G996U1UESJHZAA/G996U1OYMJHZAA/G996U1UESJHZAA
VZWUSA (Verizon)Jan 28, 2026day 0G996U1UESJHZAA/G996U1OYMJHZAA/G996U1UESJHZAA
XAAUSA (unlocked)Jan 28, 2026day 0G996U1UESJHZAA/G996U1OYMJHZAA/G996U1UESJHZAA
XARUSA (Cellular South)Jan 28, 2026day 0G996U1UESJHZAA/G996U1OYMJHZAA/G996U1UESJHZAA
XASUSA (Sprint)Jan 28, 2026day 0G996U1UESJHZAA/G996U1OYMJHZAA/G996U1UESJHZAA

Download and release notes

samloader download -m SM-G996U1 -r XAA -v G996U1UESJHZAA/G996U1OYMJHZAA/G996U1UESJHZAA

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 G996U1UESJHZAA.