F971U1UES2AZH7 – Galaxy Z Fold8 firmware

Build F971U1UES2AZH7 is a security update for the Galaxy Z Fold8 (SM-F971U1) on Android 17 (One UI 9). It first appeared on Samsung's servers on Aug 12, 2026 (method) and has reached 13 regions so far. It raises the bootloader bit from 1 to 2: once installed, the device no longer accepts firmware with bit 1 or lower, so a downgrade to F971U1UEU1AZGI is blocked. Samsung still serves this file.

Model
SM-F971U1
Android
Android 17
Type
Security
Bootloader bit
2
First released
Aug 12, 2026
Regions
13

Rollout timeline by region

The date each region code (CSC) first received F971U1UES2AZH7, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Aug 12, 2026day 0F971U1UES2AZH7/F971U1OYM2AZH7/F971U1UES2AZH7
AIOUSA (Cricket)Aug 12, 2026day 0F971U1UES2AZH7/F971U1OYM2AZH7/F971U1UES2AZH7
ATTUSA (AT&T)Aug 12, 2026day 0F971U1UES2AZH7/F971U1OYM2AZH7/F971U1UES2AZH7
CCTUSA (Comcast)Aug 12, 2026day 0F971U1UES2AZH7/F971U1OYM2AZH7/F971U1UES2AZH7
DSAUSAAug 12, 2026day 0F971U1UES2AZH7/F971U1OYM2AZH7/F971U1UES2AZH7
DSHUSAAug 12, 2026day 0F971U1UES2AZH7/F971U1OYM2AZH7/F971U1UES2AZH7
LRAUSA (Bluegrass)Aug 12, 2026day 0F971U1UES2AZH7/F971U1OYM2AZH7/F971U1UES2AZH7
TFNUSA (TracFone)Aug 12, 2026day 0F971U1UES2AZH7/F971U1OYM2AZH7/F971U1UES2AZH7
TMBUSA (T-Mobile)Aug 12, 2026day 0F971U1UES2AZH7/F971U1OYM2AZH7/F971U1UES2AZH7
TMKUSA (MetroPCS)Aug 12, 2026day 0F971U1UES2AZH7/F971U1OYM2AZH7/F971U1UES2AZH7
VZWUSA (Verizon)Aug 12, 2026day 0F971U1UES2AZH7/F971U1OYM2AZH7/F971U1UES2AZH7
XAAUSA (unlocked)Aug 12, 2026day 0F971U1UES2AZH7/F971U1OYM2AZH7/F971U1UES2AZH7
XARUSA (Cellular South)Aug 12, 2026day 0F971U1UES2AZH7/F971U1OYM2AZH7/F971U1UES2AZH7

Download and release notes

samloader download -m SM-F971U1 -r XAA -v F971U1UES2AZH7/F971U1OYM2AZH7/F971U1UES2AZH7

Samsung's release notes and security patch level for this update: SM-F971U1 / XAA on doc.samsungmobile.com. What each part of the build number means: decode F971U1UES2AZH7.