A055MUBUGDZB2 – Galaxy A05 firmware

Build A055MUBUGDZB2 is a feature update for the Galaxy A05 (SM-A055M) on Android 15 (One UI 7). It first appeared on Samsung's servers on Mar 12, 2026 (method) and has reached 39 regions so far. It raises the bootloader bit from 15 to 16: once installed, the device no longer accepts firmware with bit 15 or lower, so a downgrade to A055MUBSFDZA1 is blocked. Samsung still serves this file.

Model
SM-A055M
Android
Android 15
Type
Feature
Bootloader bit
16
First released
Mar 12, 2026
Regions
39

Rollout timeline by region

The date each region code (CSC) first received A055MUBUGDZB2, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
TPAPanamaMar 12, 2026day 0A055MUBUGDZB2/A055MOWOGDZB2/A055MUBUGDZB2
AROArgentinaMar 16, 2026+4 daysA055MUBUGDZB2/A055MOWOGDZB2/A055MUBUGDZB2
CDRDominican RepublicMar 16, 2026+4 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
CGUGuatemala (Claro)Mar 16, 2026+4 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
COBColombia (Movistar)Mar 16, 2026+4 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
COLColombiaMar 16, 2026+4 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
COMColombia (Claro)Mar 16, 2026+4 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
COOColombiaMar 16, 2026+4 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
CTIArgentina (Claro)Mar 16, 2026+4 daysA055MUBUGDZB2/A055MOWOGDZB2/A055MUBUGDZB2
EBEEcuadorMar 16, 2026+4 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
ECOEcuadorMar 16, 2026+4 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
GTOGuatemalaMar 16, 2026+4 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
PEOPeruMar 16, 2026+4 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
PETPeru (Movistar)Mar 16, 2026+4 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
PGUGuatemalaMar 16, 2026+4 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
PNTPanamaMar 16, 2026+4 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
PSNArgentina (Personal)Mar 16, 2026+4 daysA055MUBUGDZB2/A055MOWOGDZB2/A055MUBUGDZB2
SAMOceaniaMar 16, 2026+4 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
UFNArgentina (Movistar)Mar 16, 2026+4 daysA055MUBUGDZB2/A055MOWOGDZB2/A055MUBUGDZB2
UYOUruguayMar 16, 2026+4 daysA055MUBUGDZB2/A055MOWOGDZB2/A055MUBUGDZB2
BVOBoliviaMar 17, 2026+5 daysA055MUBUGDZB2/A055MOWOGDZB2/A055MUBUGDZB2
CRCCosta RicaMar 17, 2026+5 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
DORDominican RepublicMar 17, 2026+5 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
GLONigeria (Glo)Mar 17, 2026+5 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
IUSMexico (AT&T)Mar 23, 2026+11 daysA055MUBUGDZB2/A055MOWOGDZB2/A055MUBUGDZB2
MXOMexicoMar 23, 2026+11 daysA055MUBUGDZB2/A055MOWOGDZB2/A055MUBUGDZB2
TCEMexico (Telcel)Mar 23, 2026+11 daysA055MUBUGDZB2/A055MOWOGDZB2/A055MUBUGDZB2
TGPParaguayMar 23, 2026+11 daysA055MUBUGDZB2/A055MOWOGDZB2/A055MUBUGDZB2
TMMMyanmarMar 23, 2026+11 daysA055MUBUGDZB2/A055MOWOGDZB2/A055MUBUGDZB2
UPOUruguayMar 23, 2026+11 daysA055MUBUGDZB2/A055MOWOGDZB2/A055MUBUGDZB2
ZTABrazil (Claro)Mar 25, 2026+13 daysA055MUBUGDZB2/A055MOWOGDZB2/A055MUBUGDZB2
ZTMBrazil (TIM)Mar 25, 2026+13 daysA055MUBUGDZB2/A055MOWOGDZB2/A055MUBUGDZB2
ZTOBrazilMar 25, 2026+13 daysA055MUBUGDZB2/A055MOWOGDZB2/A055MUBUGDZB2
ZVVBrazil (Vivo)Mar 25, 2026+13 daysA055MUBUGDZB2/A055MOWOGDZB2/A055MUBUGDZB2
CHEChile (Entel)Apr 6, 2026+25 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
CHLChile (Claro)Apr 6, 2026+25 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
CHOChileApr 6, 2026+25 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
CHTChile (Movistar)Apr 6, 2026+25 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2
CHXChileApr 6, 2026+25 daysA055MUBUGDZB2/A055MOWBGDZB2/A055MUBUGDZB2

Download and release notes

samloader download -m SM-A055M -r TPA -v A055MUBUGDZB2/A055MOWOGDZB2/A055MUBUGDZB2

Samsung's release notes and security patch level for this update: SM-A055M / TPA on doc.samsungmobile.com. What each part of the build number means: decode A055MUBUGDZB2.