F971U1UEU3AZI8 – Galaxy Z Fold8 firmware

Build F971U1UEU3AZI8 is a feature update for the Galaxy Z Fold8 (SM-F971U1) on Android 17 (One UI 9). It first appeared on Samsung's servers on Sep 21, 2026 (method) and has reached 13 regions so far. It keeps bootloader bit 3, so downgrading to the previous build F971U1UEU3AZI5 is still possible. Samsung still serves this file.

Model
SM-F971U1
Android
Android 17
Type
Feature
Bootloader bit
3
First released
Sep 21, 2026
Regions
13

Rollout timeline by region

The date each region code (CSC) first received F971U1UEU3AZI8, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Sep 21, 2026day 0F971U1UEU3AZI8/F971U1OYM3AZI8/F971U1UEU3AZI8
AIOUSA (Cricket)Sep 21, 2026day 0F971U1UEU3AZI8/F971U1OYM3AZI8/F971U1UEU3AZI8
ATTUSA (AT&T)Sep 21, 2026day 0F971U1UEU3AZI8/F971U1OYM3AZI8/F971U1UEU3AZI8
CCTUSA (Comcast)Sep 21, 2026day 0F971U1UEU3AZI8/F971U1OYM3AZI8/F971U1UEU3AZI8
DSAUSASep 21, 2026day 0F971U1UEU3AZI8/F971U1OYM3AZI8/F971U1UEU3AZI8
DSHUSASep 21, 2026day 0F971U1UEU3AZI8/F971U1OYM3AZI8/F971U1UEU3AZI8
LRAUSA (Bluegrass)Sep 21, 2026day 0F971U1UEU3AZI8/F971U1OYM3AZI8/F971U1UEU3AZI8
TFNUSA (TracFone)Sep 21, 2026day 0F971U1UEU3AZI8/F971U1OYM3AZI8/F971U1UEU3AZI8
TMBUSA (T-Mobile)Sep 21, 2026day 0F971U1UEU3AZI8/F971U1OYM3AZI8/F971U1UEU3AZI8
TMKUSA (MetroPCS)Sep 21, 2026day 0F971U1UEU3AZI8/F971U1OYM3AZI8/F971U1UEU3AZI8
VZWUSA (Verizon)Sep 21, 2026day 0F971U1UEU3AZI8/F971U1OYM3AZI8/F971U1UEU3AZI8
XAAUSA (unlocked)Sep 21, 2026day 0F971U1UEU3AZI8/F971U1OYM3AZI8/F971U1UEU3AZI8
XARUSA (Cellular South)Sep 21, 2026day 0F971U1UEU3AZI8/F971U1OYM3AZI8/F971U1UEU3AZI8

Download and release notes

samloader download -m SM-F971U1 -r XAA -v F971U1UEU3AZI8/F971U1OYM3AZI8/F971U1UEU3AZI8

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 F971U1UEU3AZI8.