M556BXXS5DZF2 – Galaxy M55 5G firmware

Build M556BXXS5DZF2 is a security update for the Galaxy M55 5G (SM-M556B) on Android 16 (One UI 8). It first appeared on Samsung's servers on Jun 17, 2026 (method) and has reached 13 regions so far. It keeps bootloader bit 5, so downgrading to the previous build M556BXXU5DZE3 is still possible. Samsung still serves this file.

Model
SM-M556B
Android
Android 16
Type
Security
Bootloader bit
5
First released
Jun 17, 2026
Regions
13

Rollout timeline by region

The date each region code (CSC) first received M556BXXS5DZF2, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
SLKSri LankaJun 17, 2026day 0M556BXXS5DZF2/M556BODM5DZF2/M556BXXS5DZF2
BNGBelgiumJun 17, 2026day 0M556BXXS5DZF2/M556BODM5DZF2/M556BXXS5DZF2
INSIndiaJun 17, 2026day 0M556BXXS5DZF2/M556BODM5DZF2/M556BXXS5DZF2
NPBNepalJun 17, 2026day 0M556BXXS5DZF2/M556BODM5DZF2/M556BXXS5DZF2
EGYEgyptJun 21, 2026+4 daysM556BXXS5DZF2/M556BOJM5DZF2/M556BXXS5DZF2
ILOIsraelJun 21, 2026+4 daysM556BXXS5DZF2/M556BOJM5DZF2/M556BXXS5DZF2
MIDMiddle EastJun 21, 2026+4 daysM556BXXS5DZF2/M556BOJM5DZF2/M556BXXS5DZF2
XXVVietnamJun 21, 2026+4 daysM556BXXS5DZF2/M556BOLM5DZF2/M556BXXS5DZF2
CHOChileJun 23, 2026+6 daysM556BXXS5DZF2/M556BOWO5DZE3/M556BXXS5DZF2
COOColombiaJun 23, 2026+6 daysM556BXXS5DZF2/M556BOWO5DZE3/M556BXXS5DZF2
PEOPeruJun 23, 2026+6 daysM556BXXS5DZF2/M556BOWO5DZE3/M556BXXS5DZF2
TPAPanamaJun 23, 2026+6 daysM556BXXS5DZF2/M556BOWO5DZE3/M556BXXS5DZF2
ZTOBrazilJun 23, 2026+6 daysM556BXXS5DZF2/M556BOWO5DZE3/M556BXXS5DZF2

Download and release notes

samloader download -m SM-M556B -r INS -v M556BXXS5DZF2/M556BODM5DZF2/M556BXXS5DZF2

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 M556BXXS5DZF2.