F966U1UESBBZG3 – Galaxy Z Fold7 firmware

Build F966U1UESBBZG3 is a security update for the Galaxy Z Fold7 (SM-F966U1) on Android 16 (One UI 8). It first appeared on Samsung's servers on Jul 14, 2026 (method) and has reached 14 regions so far. It raises the bootloader bit from 10 to 11: once installed, the device no longer accepts firmware with bit 10 or lower, so a downgrade to F966U1UEUABZF1 is blocked. Samsung still serves this file.

Model
SM-F966U1
Android
Android 16
Type
Security
Bootloader bit
11
First released
Jul 14, 2026
Regions
14

Rollout timeline by region

The date each region code (CSC) first received F966U1UESBBZG3, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ATTUSA (AT&T)Jul 14, 2026day 0F966U1UESBBZG3/F966U1OYMBBZG3/F966U1UESBBZG3
AIOUSA (Cricket)Jul 14, 2026day 0F966U1UESBBZG3/F966U1OYMBBZG3/F966U1UESBBZG3
TMBUSA (T-Mobile)Jul 14, 2026day 0F966U1UESBBZG3/F966U1OYMBBZG3/F966U1UESBBZG3
TMKUSA (MetroPCS)Jul 14, 2026day 0F966U1UESBBZG3/F966U1OYMBBZG3/F966U1UESBBZG3
TFNUSA (TracFone)Jul 14, 2026day 0F966U1UESBBZG3/F966U1OYMBBZG3/F966U1UESBBZG3
VZWUSA (Verizon)Jul 14, 2026day 0F966U1UESBBZG3/F966U1OYMBBZG3/F966U1UESBBZG3
XAAUSA (unlocked)Jul 14, 2026day 0F966U1UESBBZG3/F966U1OYMBBZG3/F966U1UESBBZG3
XARUSA (Cellular South)Jul 14, 2026day 0F966U1UESBBZG3/F966U1OYMBBZG3/F966U1UESBBZG3
CCTUSA (Comcast)Jul 14, 2026day 0F966U1UESBBZG3/F966U1OYMBBZG3/F966U1UESBBZG3
ACGUSA (C Spire)Jul 15, 2026+1 dayF966U1UESBBZG3/F966U1OYMBBZG3/F966U1UESBBZG3
DSAUSAJul 15, 2026+1 dayF966U1UESBBZG3/F966U1OYMBBZG3/F966U1UESBBZG3
DSHUSAJul 15, 2026+1 dayF966U1UESBBZG3/F966U1OYMBBZG3/F966U1UESBBZG3
LRAUSA (Bluegrass)Jul 15, 2026+1 dayF966U1UESBBZG3/F966U1OYMBBZG3/F966U1UESBBZG3
USCUSA (US Cellular)Jul 15, 2026+1 dayF966U1UESBBZG3/F966U1OYMBBZG3/F966U1UESBBZG3

Download and release notes

samloader download -m SM-F966U1 -r XAA -v F966U1UESBBZG3/F966U1OYMBBZG3/F966U1UESBBZG3

Samsung's release notes and security patch level for this update: SM-F966U1 / XAA on doc.samsungmobile.com. What each part of the build number means: decode F966U1UESBBZG3.