S948U1UEU4BZID – Galaxy S26 Ultra firmware

Build S948U1UEU4BZID is a feature update for the Galaxy S26 Ultra (SM-S948U1) on Android 17 (One UI 9). It first appeared on Samsung's servers on Sep 27, 2026 (method) and has reached 14 regions so far. It keeps bootloader bit 4, so downgrading to the previous build S948U1UES4AZHL is still possible. Samsung still serves this file.

Model
SM-S948U1
Android
Android 17
Type
Feature
Bootloader bit
4
First released
Sep 27, 2026
Regions
14

Rollout timeline by region

The date each region code (CSC) first received S948U1UEU4BZID, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Sep 27, 2026day 0S948U1UEU4BZID/S948U1OYM4BZID/S948U1UEU4BZID
AIOUSA (Cricket)Sep 27, 2026day 0S948U1UEU4BZID/S948U1OYM4BZID/S948U1UEU4BZID
ATTUSA (AT&T)Sep 27, 2026day 0S948U1UEU4BZID/S948U1OYM4BZID/S948U1UEU4BZID
CCTUSA (Comcast)Sep 27, 2026day 0S948U1UEU4BZID/S948U1OYM4BZID/S948U1UEU4BZID
DSAUSASep 27, 2026day 0S948U1UEU4BZID/S948U1OYM4BZID/S948U1UEU4BZID
DSHUSASep 27, 2026day 0S948U1UEU4BZID/S948U1OYM4BZID/S948U1UEU4BZID
LRAUSA (Bluegrass)Sep 27, 2026day 0S948U1UEU4BZID/S948U1OYM4BZID/S948U1UEU4BZID
TFNUSA (TracFone)Sep 27, 2026day 0S948U1UEU4BZID/S948U1OYM4BZID/S948U1UEU4BZID
TMBUSA (T-Mobile)Sep 27, 2026day 0S948U1UEU4BZID/S948U1OYM4BZID/S948U1UEU4BZID
TMKUSA (MetroPCS)Sep 27, 2026day 0S948U1UEU4BZID/S948U1OYM4BZID/S948U1UEU4BZID
USCUSA (US Cellular)Sep 27, 2026day 0S948U1UEU4BZID/S948U1OYM4BZID/S948U1UEU4BZID
VZWUSA (Verizon)Sep 27, 2026day 0S948U1UEU4BZID/S948U1OYM4BZID/S948U1UEU4BZID
XAAUSA (unlocked)Sep 27, 2026day 0S948U1UEU4BZID/S948U1OYM4BZID/S948U1UEU4BZID
XARUSA (Cellular South)Sep 27, 2026day 0S948U1UEU4BZID/S948U1OYM4BZID/S948U1UEU4BZID

Download and release notes

samloader download -m SM-S948U1 -r XAA -v S948U1UEU4BZID/S948U1OYM4BZID/S948U1UEU4BZID

Samsung's release notes and security patch level for this update: SM-S948U1 / XAA on doc.samsungmobile.com. What each part of the build number means: decode S948U1UEU4BZID.