A556BXXUEDZE4 – Galaxy A55 5G firmware

Build A556BXXUEDZE4 is a feature update for the Galaxy A55 5G (SM-A556B) on Android 16 (One UI 8). It first appeared on Samsung's servers on May 31, 2026 (method) and has reached 16 regions so far. It keeps bootloader bit 14, so downgrading to the previous build A556BXXSECZDE is still possible. Samsung still serves this file.

Model
SM-A556B
Android
Android 16
Type
Feature
Bootloader bit
14
First released
May 31, 2026
Regions
16

Rollout timeline by region

The date each region code (CSC) first received A556BXXUEDZE4, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
BOGFrance (Bouygues)May 31, 2026day 0A556BXXUEDZE4/A556BOXMEDZE4/A556BXXUEDZE4
EUXEurope (Multi-CSC)May 31, 2026day 0A556BXXUEDZE4/A556BOXMEDZE4/A556BXXUEDZE4
EUYEurope (Multi-CSC)May 31, 2026day 0A556BXXUEDZE4/A556BOXMEDZE4/A556BXXUEDZE4
EVRUnited Kingdom (EE)May 31, 2026day 0A556BXXUEDZE4/A556BOXMEDZE4/A556BXXUEDZE4
MEOPortugal (MEO)May 31, 2026day 0A556BXXUEDZE4/A556BOXMEDZE4/A556BXXUEDZE4
MOBAustria (A1)May 31, 2026day 0A556BXXUEDZE4/A556BOXMEDZE4/A556BXXUEDZE4
MOTSlovenia (Telekom)May 31, 2026day 0A556BXXUEDZE4/A556BOXMEDZE4/A556BXXUEDZE4
MSRSerbiaMay 31, 2026day 0A556BXXUEDZE4/A556BOXMEDZE4/A556BXXUEDZE4
O2CCzech Republic (O2)May 31, 2026day 0A556BXXUEDZE4/A556BOXMEDZE4/A556BXXUEDZE4
PLSPoland (Plus)May 31, 2026day 0A556BXXUEDZE4/A556BOXMEDZE4/A556BXXUEDZE4
PRTPoland (Play)May 31, 2026day 0A556BXXUEDZE4/A556BOXMEDZE4/A556BXXUEDZE4
SFRFrance (SFR)May 31, 2026day 0A556BXXUEDZE4/A556BOXMEDZE4/A556BXXUEDZE4
SIMSlovenia (A1)May 31, 2026day 0A556BXXUEDZE4/A556BOXMEDZE4/A556BXXUEDZE4
SWCSwitzerlandMay 31, 2026day 0A556BXXUEDZE4/A556BOXMEDZE4/A556BXXUEDZE4
TOPSerbia/MontenegroMay 31, 2026day 0A556BXXUEDZE4/A556BOXMEDZE4/A556BXXUEDZE4
VIPCroatia (A1)May 31, 2026day 0A556BXXUEDZE4/A556BOXMEDZE4/A556BXXUEDZE4

Download and release notes

samloader download -m SM-A556B -r EUX -v A556BXXUEDZE4/A556BOXMEDZE4/A556BXXUEDZE4

Samsung's release notes and security patch level for this update: SM-A556B / EUX on doc.samsungmobile.com. What each part of the build number means: decode A556BXXUEDZE4.