G766U1UESACZI3 – Galaxy XCover7 Pro firmware

Build G766U1UESACZI3 is a security update for the Galaxy XCover7 Pro (SM-G766U1) on Android 16 (One UI 8). It first appeared on Samsung's servers on Sep 28, 2026 (method) and has reached 12 regions so far. It raises the bootloader bit from 9 to 10: once installed, the device no longer accepts firmware with bit 9 or lower, so a downgrade to G766U1UES9CZH1 is blocked. Samsung still serves this file.

Model
SM-G766U1
Android
Android 16
Type
Security
Bootloader bit
10
First released
Sep 28, 2026
Regions
12

Rollout timeline by region

The date each region code (CSC) first received G766U1UESACZI3, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Sep 28, 2026day 0G766U1UESACZI3/G766U1OYMACZI3/G766U1UESACZI3
AIOUSA (Cricket)Sep 28, 2026day 0G766U1UESACZI3/G766U1OYMACZI3/G766U1UESACZI3
ATTUSA (AT&T)Sep 28, 2026day 0G766U1UESACZI3/G766U1OYMACZI3/G766U1UESACZI3
CCTUSA (Comcast)Sep 28, 2026day 0G766U1UESACZI3/G766U1OYMACZI3/G766U1UESACZI3
DSAUSASep 28, 2026day 0G766U1UESACZI3/G766U1OYMACZI3/G766U1UESACZI3
DSHUSASep 28, 2026day 0G766U1UESACZI3/G766U1OYMACZI3/G766U1UESACZI3
LRAUSA (Bluegrass)Sep 28, 2026day 0G766U1UESACZI3/G766U1OYMACZI3/G766U1UESACZI3
TMBUSA (T-Mobile)Sep 28, 2026day 0G766U1UESACZI3/G766U1OYMACZI3/G766U1UESACZI3
TMKUSA (MetroPCS)Sep 28, 2026day 0G766U1UESACZI3/G766U1OYMACZI3/G766U1UESACZI3
VZWUSA (Verizon)Sep 28, 2026day 0G766U1UESACZI3/G766U1OYMACZI3/G766U1UESACZI3
XAAUSA (unlocked)Sep 28, 2026day 0G766U1UESACZI3/G766U1OYMACZI3/G766U1UESACZI3
XARUSA (Cellular South)Sep 28, 2026day 0G766U1UESACZI3/G766U1OYMACZI3/G766U1UESACZI3

Download and release notes

samloader download -m SM-G766U1 -r XAA -v G766U1UESACZI3/G766U1OYMACZI3/G766U1UESACZI3

Samsung's release notes and security patch level for this update: SM-G766U1 / XAA on doc.samsungmobile.com. What each part of the build number means: decode G766U1UESACZI3.