G955U1UEU8DZE2 – Galaxy S8+ firmware

Build G955U1UEU8DZE2 is a feature update for the Galaxy S8+ (SM-G955U1) on Android 9. It first appeared on Samsung's servers on Jun 17, 2026 (method) and has reached 11 regions so far. It keeps bootloader bit 8, so downgrading to the previous build G955U1UEU8DVD4 is still possible. Samsung still serves this file.

Model
SM-G955U1
Android
Android 9
Type
Feature
Bootloader bit
8
First released
Jun 17, 2026
Regions
11

Not yet released in 3 regions that are still on an older build: BST, VMU, XAS.

Rollout timeline by region

The date each region code (CSC) first received G955U1UEU8DZE2, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
ACGUSA (C Spire)Jun 17, 2026day 0G955U1UEU8DZE2/G955U1OYM8DZE2/G955U1UEU8DZE2
AIOUSA (Cricket)Jun 17, 2026day 0G955U1UEU8DZE2/G955U1OYM8DZE2/G955U1UEU8DZE2
ATTUSA (AT&T)Jun 17, 2026day 0G955U1UEU8DZE2/G955U1OYM8DZE2/G955U1UEU8DZE2
LRAUSA (Bluegrass)Jun 17, 2026day 0G955U1UEU8DZE2/G955U1OYM8DZE2/G955U1UEU8DZE2
SPRUSA (Sprint)Jun 17, 2026day 0G955U1UEU8DZE2/G955U1OYM8DZE2/G955U1UEU8DZE2
TFNUSA (TracFone)Jun 17, 2026day 0G955U1UEU8DZE2/G955U1OYM8DZE2/G955U1UEU8DZE2
TMBUSA (T-Mobile)Jun 17, 2026day 0G955U1UEU8DZE2/G955U1OYM8DZE2/G955U1UEU8DZE2
TMKUSA (MetroPCS)Jun 17, 2026day 0G955U1UEU8DZE2/G955U1OYM8DZE2/G955U1UEU8DZE2
USCUSA (US Cellular)Jun 17, 2026day 0G955U1UEU8DZE2/G955U1OYM8DZE2/G955U1UEU8DZE2
VZWUSA (Verizon)Jun 17, 2026day 0G955U1UEU8DZE2/G955U1OYM8DZE2/G955U1UEU8DZE2
XAAUSA (unlocked)Jun 17, 2026day 0G955U1UEU8DZE2/G955U1OYM8DZE2/G955U1UEU8DZE2

Download and release notes

samloader download -m SM-G955U1 -r XAA -v G955U1UEU8DZE2/G955U1OYM8DZE2/G955U1UEU8DZE2

Samsung's release notes and security patch level for this update: SM-G955U1 / XAA on doc.samsungmobile.com. What each part of the build number means: decode G955U1UEU8DZE2.