A055MUBSHDZD1 – Galaxy A05 firmware

Build A055MUBSHDZD1 is a security update for the Galaxy A05 (SM-A055M) on Android 15 (One UI 7). It first appeared on Samsung's servers on Apr 14, 2026 (method) and has reached 39 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 A055MUBUGDZB2 is blocked. Samsung still serves this file.

Model
SM-A055M
Android
Android 15
Type
Security
Bootloader bit
17
First released
Apr 14, 2026
Regions
39

Rollout timeline by region

The date each region code (CSC) first received A055MUBSHDZD1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
AROArgentinaApr 14, 2026day 0A055MUBSHDZD1/A055MOWOHDZD1/A055MUBSHDZD1
BVOBoliviaApr 14, 2026day 0A055MUBSHDZD1/A055MOWOHDZD1/A055MUBSHDZD1
CDRDominican RepublicApr 14, 2026day 0A055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
CGUGuatemala (Claro)Apr 14, 2026day 0A055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
COMColombia (Claro)Apr 14, 2026day 0A055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
CTIArgentina (Claro)Apr 14, 2026day 0A055MUBSHDZD1/A055MOWOHDZD1/A055MUBSHDZD1
GTOGuatemalaApr 14, 2026day 0A055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
PGUGuatemalaApr 14, 2026day 0A055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
PSNArgentina (Personal)Apr 14, 2026day 0A055MUBSHDZD1/A055MOWOHDZD1/A055MUBSHDZD1
TGPParaguayApr 14, 2026day 0A055MUBSHDZD1/A055MOWOHDZD1/A055MUBSHDZD1
TPAPanamaApr 14, 2026day 0A055MUBSHDZD1/A055MOWOHDZD1/A055MUBSHDZD1
UFNArgentina (Movistar)Apr 14, 2026day 0A055MUBSHDZD1/A055MOWOHDZD1/A055MUBSHDZD1
UPOUruguayApr 14, 2026day 0A055MUBSHDZD1/A055MOWOHDZD1/A055MUBSHDZD1
UYOUruguayApr 14, 2026day 0A055MUBSHDZD1/A055MOWOHDZD1/A055MUBSHDZD1
ZTABrazil (Claro)Apr 14, 2026day 0A055MUBSHDZD1/A055MOWOHDZD1/A055MUBSHDZD1
ZTMBrazil (TIM)Apr 14, 2026day 0A055MUBSHDZD1/A055MOWOHDZD1/A055MUBSHDZD1
ZTOBrazilApr 14, 2026day 0A055MUBSHDZD1/A055MOWOHDZD1/A055MUBSHDZD1
ZVVBrazil (Vivo)Apr 14, 2026day 0A055MUBSHDZD1/A055MOWOHDZD1/A055MUBSHDZD1
CRCCosta RicaApr 14, 2026day 0A055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
DORDominican RepublicApr 14, 2026day 0A055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
GLONigeria (Glo)Apr 14, 2026day 0A055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
CHEChile (Entel)Apr 15, 2026+1 dayA055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
CHLChile (Claro)Apr 15, 2026+1 dayA055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
CHOChileApr 15, 2026+1 dayA055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
CHTChile (Movistar)Apr 15, 2026+1 dayA055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
CHXChileApr 15, 2026+1 dayA055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
COBColombia (Movistar)Apr 22, 2026+8 daysA055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
COLColombiaApr 22, 2026+8 daysA055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
COOColombiaApr 22, 2026+8 daysA055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
EBEEcuadorApr 22, 2026+8 daysA055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
ECOEcuadorApr 22, 2026+8 daysA055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
IUSMexico (AT&T)Apr 22, 2026+8 daysA055MUBSHDZD1/A055MOWOHDZD1/A055MUBSHDZD1
MXOMexicoApr 22, 2026+8 daysA055MUBSHDZD1/A055MOWOHDZD1/A055MUBSHDZD1
TCEMexico (Telcel)Apr 22, 2026+8 daysA055MUBSHDZD1/A055MOWOHDZD1/A055MUBSHDZD1
TMMMyanmarApr 22, 2026+8 daysA055MUBSHDZD1/A055MOWOHDZD1/A055MUBSHDZD1
PEOPeruApr 23, 2026+9 daysA055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
PETPeru (Movistar)Apr 23, 2026+9 daysA055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
PNTPanamaApr 23, 2026+9 daysA055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1
SAMOceaniaApr 23, 2026+9 daysA055MUBSHDZD1/A055MOWBHDZD1/A055MUBSHDZD1

Download and release notes

samloader download -m SM-A055M -r ARO -v A055MUBSHDZD1/A055MOWOHDZD1/A055MUBSHDZD1

Samsung's release notes and security patch level for this update: SM-A055M / ARO on doc.samsungmobile.com. What each part of the build number means: decode A055MUBSHDZD1.