G955U1UES8DUB1 – Galaxy S8+ firmware

Build G955U1UES8DUB1 is a security update for the Galaxy S8+ (SM-G955U1) on Android 9. It first appeared on Samsung's servers on Mar 11, 2021 (method) and has reached 14 regions so far. It keeps bootloader bit 8, so downgrading to the previous build G955U1UES8DTJ1 is still possible. Samsung still serves this file.

Model
SM-G955U1
Android
Android 9
Type
Security
Bootloader bit
8
First released
Mar 11, 2021
Regions
14

Rollout timeline by region

The date each region code (CSC) first received G955U1UES8DUB1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
XASUSA (Sprint)Mar 11, 2021day 0G955U1UES8DUB1/G955U1OYM8DUB1/G955U1UES8DUB1
VMUUSA (Virgin)Mar 11, 2021day 0G955U1UES8DUB1/G955U1OYM8DUB1/G955U1UES8DUB1
BSTUSA (Boost)Mar 11, 2021day 0G955U1UES8DUB1/G955U1OYM8DUB1/G955U1UES8DUB1
XAAUSA (unlocked)Mar 11, 2021day 0G955U1UES8DUB1/G955U1OYM8DUB1/G955U1UES8DUB1
VZWUSA (Verizon)Mar 11, 2021day 0G955U1UES8DUB1/G955U1OYM8DUB1/G955U1UES8DUB1
USCUSA (US Cellular)Mar 11, 2021day 0G955U1UES8DUB1/G955U1OYM8DUB1/G955U1UES8DUB1
SPRUSA (Sprint)Mar 11, 2021day 0G955U1UES8DUB1/G955U1OYM8DUB1/G955U1UES8DUB1
LRAUSA (Bluegrass)Mar 11, 2021day 0G955U1UES8DUB1/G955U1OYM8DUB1/G955U1UES8DUB1
AIOUSA (Cricket)Mar 11, 2021day 0G955U1UES8DUB1/G955U1OYM8DUB1/G955U1UES8DUB1
ACGUSA (C Spire)Mar 11, 2021day 0G955U1UES8DUB1/G955U1OYM8DUB1/G955U1UES8DUB1
ATTUSA (AT&T)Mar 11, 2021day 0G955U1UES8DUB1/G955U1OYM8DUB1/G955U1UES8DUB1
TFNUSA (TracFone)Mar 14, 2021+3 daysG955U1UES8DUB1/G955U1OYM8DUB1/G955U1UES8DUB1
TMKUSA (MetroPCS)Mar 14, 2021+3 daysG955U1UES8DUB1/G955U1OYM8DUB1/G955U1UES8DUB1
TMBUSA (T-Mobile)Mar 14, 2021+3 daysG955U1UES8DUB1/G955U1OYM8DUB1/G955U1UES8DUB1

Download and release notes

samloader download -m SM-G955U1 -r XAA -v G955U1UES8DUB1/G955U1OYM8DUB1/G955U1UES8DUB1

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 G955U1UES8DUB1.