A556EXXSHDZH6 – Galaxy A55 5G firmware

Build A556EXXSHDZH6 is a security update for the Galaxy A55 5G (SM-A556E) on Android 16 (One UI 8). It first appeared on Samsung's servers on Sep 2, 2026 (method) and has reached 82 regions so far. It raises the bootloader bit from 16 to 17: once installed, the device no longer accepts firmware with bit 16 or lower, so a downgrade to A556EXXSGDZG2 is blocked. Samsung still serves this file.

Model
SM-A556E
Android
Android 16
Type
Security
Bootloader bit
17
First released
Sep 2, 2026
Regions
82

Rollout timeline by region

The date each region code (CSC) first received A556EXXSHDZH6, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
GLBPhilippines (Globe)Sep 2, 2026day 0A556EXXSHDZH6/A556EOLMHDZH6/A556EXXSHDZH6
MYMMyanmarSep 2, 2026day 0A556EXXSHDZH6/A556EOLMHDZH6/A556EXXSHDZH6
THLThailandSep 2, 2026day 0A556EXXSHDZH6/A556EOLMHDZH6/A556EXXSHDZH6
XMEMalaysiaSep 2, 2026day 0A556EXXSHDZH6/A556EOLMHDZH6/A556EXXSHDZH6
XTCPhilippinesSep 2, 2026day 0A556EXXSHDZH6/A556EOLMHDZH6/A556EXXSHDZH6
XXVVietnamSep 2, 2026day 0A556EXXSHDZH6/A556EOLMHDZH6/A556EXXSHDZH6
CAUCaucasusSep 2, 2026day 0A556EXXSHDZH6/A556EOXEHDZH6/A556EXXSHDZH6
SERRussiaSep 2, 2026day 0A556EXXSHDZH6/A556EOXEHDZH6/A556EXXSHDZH6
SKZKazakhstanSep 2, 2026day 0A556EXXSHDZH6/A556EOXEHDZH6/A556EXXSHDZH6
BVOBoliviaSep 4, 2026+2 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
CGUGuatemala (Claro)Sep 4, 2026+2 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
COMColombia (Claro)Sep 4, 2026+2 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
CDRDominican RepublicSep 4, 2026+2 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
GTOGuatemalaSep 4, 2026+2 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
IUSMexico (AT&T)Sep 4, 2026+2 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
MXOMexicoSep 4, 2026+2 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
PGUGuatemalaSep 4, 2026+2 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
TCEMexico (Telcel)Sep 4, 2026+2 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
TMMMyanmarSep 4, 2026+2 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
TPAPanamaSep 4, 2026+2 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
ZTABrazil (Claro)Sep 4, 2026+2 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
ZTMBrazil (TIM)Sep 4, 2026+2 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
ZTOBrazilSep 4, 2026+2 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
ZVVBrazil (Vivo)Sep 4, 2026+2 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
AFGAfghanistanSep 6, 2026+4 daysA556EXXSHDZH6/A556EOJMHDZH6/A556EXXSHDZH6
EGYEgyptSep 6, 2026+4 daysA556EXXSHDZH6/A556EOJMHDZH6/A556EXXSHDZH6
KSASaudi ArabiaSep 6, 2026+4 daysA556EXXSHDZH6/A556EOJMHDZH6/A556EXXSHDZH6
LYSLibyaSep 6, 2026+4 daysA556EXXSHDZH6/A556EOJMHDZH6/A556EXXSHDZH6
MIDMiddle EastSep 6, 2026+4 daysA556EXXSHDZH6/A556EOJMHDZH6/A556EXXSHDZH6
PAKPakistanSep 6, 2026+4 daysA556EXXSHDZH6/A556EOJMHDZH6/A556EXXSHDZH6
TUNTunisiaSep 6, 2026+4 daysA556EXXSHDZH6/A556EOJMHDZH6/A556EXXSHDZH6
XSGUnited Arab EmiratesSep 6, 2026+4 daysA556EXXSHDZH6/A556EOJMHDZH6/A556EXXSHDZH6
ACRGhanaSep 7, 2026+5 daysA556EXXSHDZH6/A556EOJMHDZH6/A556EXXSHDZH6
AFRAfricaSep 7, 2026+5 daysA556EXXSHDZH6/A556EOJMHDZH6/A556EXXSHDZH6
DKRSenegalSep 7, 2026+5 daysA556EXXSHDZH6/A556EOJMHDZH6/A556EXXSHDZH6
ECTNigeriaSep 7, 2026+5 daysA556EXXSHDZH6/A556EOJMHDZH6/A556EXXSHDZH6
MM1Singapore (M1)Sep 7, 2026+5 daysA556EXXSHDZH6/A556EOLMHDZH6/A556EXXSHDZH6
MWDMoroccoSep 7, 2026+5 daysA556EXXSHDZH6/A556EOJMHDZH6/A556EXXSHDZH6
PKDPakistanSep 7, 2026+5 daysA556EXXSHDZH6/A556EOJMHDZH6/A556EXXSHDZH6
SINSingapore (Singtel)Sep 7, 2026+5 daysA556EXXSHDZH6/A556EOLMHDZH6/A556EXXSHDZH6
STHSingapore (StarHub)Sep 7, 2026+5 daysA556EXXSHDZH6/A556EOLMHDZH6/A556EXXSHDZH6
TURTurkeySep 7, 2026+5 daysA556EXXSHDZH6/A556EOJMHDZH6/A556EXXSHDZH6
XFASouth AfricaSep 7, 2026+5 daysA556EXXSHDZH6/A556EOJMHDZH6/A556EXXSHDZH6
XFESouth AfricaSep 7, 2026+5 daysA556EXXSHDZH6/A556EOJMHDZH6/A556EXXSHDZH6
XFVSouth Africa (Vodacom)Sep 7, 2026+5 daysA556EXXSHDZH6/A556EOJMHDZH6/A556EXXSHDZH6
XIDIndonesiaSep 7, 2026+5 daysA556EXXSHDZH6/A556EOLEHDZH6/A556EXXSHDZH6
XNZNew ZealandSep 7, 2026+5 daysA556EXXSHDZH6/A556EOLMHDZH6/A556EXXSHDZH6
XSPSingaporeSep 7, 2026+5 daysA556EXXSHDZH6/A556EOLMHDZH6/A556EXXSHDZH6
OPSAustralia (Optus)Sep 7, 2026+5 daysA556EXXSHDZH6/A556EOLMHDZH6/A556EXXSHDZH6
TELAustralia (Telstra)Sep 7, 2026+5 daysA556EXXSHDZH6/A556EOLMHDZH6/A556EXXSHDZH6
VAUAustralia (Vodafone)Sep 7, 2026+5 daysA556EXXSHDZH6/A556EOLMHDZH6/A556EXXSHDZH6
XSAAustraliaSep 7, 2026+5 daysA556EXXSHDZH6/A556EOLMHDZH6/A556EXXSHDZH6
BKDBangladeshSep 7, 2026+5 daysA556EXXSHDZH6/A556EODMHDZH4/A556EXXSHDZH6
BNGBelgiumSep 7, 2026+5 daysA556EXXSHDZH6/A556EODMHDZH4/A556EXXSHDZH6
NPBNepalSep 7, 2026+5 daysA556EXXSHDZH6/A556EODMHDZH4/A556EXXSHDZH6
SLKSri LankaSep 7, 2026+5 daysA556EXXSHDZH6/A556EODMHDZH4/A556EXXSHDZH6
INSIndiaSep 7, 2026+5 daysA556EXXSHDZH6/A556EODMHDZH4/A556EXXSHDZH6
ILOIsraelSep 7, 2026+5 daysA556EXXSHDZH6/A556EOJMHDZH6/A556EXXSHDZH6
CHEChile (Entel)Sep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
CHLChile (Claro)Sep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
CHOChileSep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
AROArgentinaSep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
CHTChile (Movistar)Sep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
CHXChileSep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
COBColombia (Movistar)Sep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
COLColombiaSep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
COOColombiaSep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
CRCCosta RicaSep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
CTIArgentina (Claro)Sep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
DORDominican RepublicSep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
EBEEcuadorSep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
ECOEcuadorSep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
GLONigeria (Glo)Sep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
PEOPeruSep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
PETPeru (Movistar)Sep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
PNTPanamaSep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
PSNArgentina (Personal)Sep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
SAMOceaniaSep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
TGPParaguaySep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
UFNArgentina (Movistar)Sep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
UPOUruguaySep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6
UYOUruguaySep 10, 2026+8 daysA556EXXSHDZH6/A556EOWOHDZH6/A556EXXSHDZH6

Download and release notes

samloader download -m SM-A556E -r INS -v A556EXXSHDZH6/A556EODMHDZH4/A556EXXSHDZH6

Samsung's release notes and security patch level for this update: SM-A556E / INS on doc.samsungmobile.com. What each part of the build number means: decode A556EXXSHDZH6.