M556BXXU5DZE3 – Galaxy M55 5G firmware

Build M556BXXU5DZE3 is a feature update for the Galaxy M55 5G (SM-M556B) on Android 16 (One UI 8). It first appeared on Samsung's servers on May 27, 2026 (method) and has reached 13 regions so far. It keeps bootloader bit 5, so downgrading to the previous build M556BXXS5CZB4 is still possible. Samsung still serves this file.

Model
SM-M556B
Android
Android 16
Type
Feature
Bootloader bit
5
First released
May 27, 2026
Regions
13

Rollout timeline by region

The date each region code (CSC) first received M556BXXU5DZE3, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
BNGBelgiumMay 27, 2026day 0M556BXXU5DZE3/M556BODM5DZE3/M556BXXU5DZE3
INSIndiaMay 27, 2026day 0M556BXXU5DZE3/M556BODM5DZE3/M556BXXU5DZE3
NPBNepalMay 27, 2026day 0M556BXXU5DZE3/M556BODM5DZE3/M556BXXU5DZE3
SLKSri LankaMay 27, 2026day 0M556BXXU5DZE3/M556BODM5DZE3/M556BXXU5DZE3
XXVVietnamMay 31, 2026+4 daysM556BXXU5DZE3/M556BOLM5DZE3/M556BXXU5DZE3
EGYEgyptMay 31, 2026+4 daysM556BXXU5DZE3/M556BOJM5DZE3/M556BXXU5DZE3
ILOIsraelMay 31, 2026+4 daysM556BXXU5DZE3/M556BOJM5DZE3/M556BXXU5DZE3
MIDMiddle EastMay 31, 2026+4 daysM556BXXU5DZE3/M556BOJM5DZE3/M556BXXU5DZE3
COOColombiaJun 1, 2026+5 daysM556BXXU5DZE3/M556BOWO5DZE3/M556BXXU5DZE3
PEOPeruJun 1, 2026+5 daysM556BXXU5DZE3/M556BOWO5DZE3/M556BXXU5DZE3
ZTOBrazilJun 1, 2026+5 daysM556BXXU5DZE3/M556BOWO5DZE3/M556BXXU5DZE3
TPAPanamaJun 2, 2026+6 daysM556BXXU5DZE3/M556BOWO5DZE3/M556BXXU5DZE3
CHOChileJun 2, 2026+6 daysM556BXXU5DZE3/M556BOWO5DZE3/M556BXXU5DZE3

Download and release notes

samloader download -m SM-M556B -r INS -v M556BXXU5DZE3/M556BODM5DZE3/M556BXXU5DZE3

Samsung's release notes and security patch level for this update: SM-M556B / INS on doc.samsungmobile.com. What each part of the build number means: decode M556BXXU5DZE3.