A336MUBSIGZE1 – Galaxy A33 5G firmware

Build A336MUBSIGZE1 is a security update for the Galaxy A33 5G (SM-A336M) on Android 16 (One UI 8). It first appeared on Samsung's servers on May 25, 2026 (method) and has reached 37 regions so far. It raises the bootloader bit from 17 to 18: once installed, the device no longer accepts firmware with bit 17 or lower, so a downgrade to A336MUBSHGZB6 is blocked. Samsung still serves this file.

Model
SM-A336M
Android
Android 16
Type
Security
Bootloader bit
18
First released
May 25, 2026
Regions
37

Rollout timeline by region

The date each region code (CSC) first received A336MUBSIGZE1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
COMColombia (Claro)May 25, 2026day 0A336MUBSIGZE1/A336MOWAIGZE1/A336MUBSIGZE1
GTOGuatemalaMay 25, 2026day 0A336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
AROArgentinaMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
BVOBoliviaMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
CGUGuatemala (Claro)May 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
COBColombia (Movistar)May 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
COLColombiaMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
COOColombiaMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
CTIArgentina (Claro)May 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
EBEEcuadorMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
IUSMexico (AT&T)May 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
MXOMexicoMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
PEOPeruMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
PETPeru (Movistar)May 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
PNTPanamaMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
PSNArgentina (Personal)May 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
SAMOceaniaMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
TCEMexico (Telcel)May 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
TMMMyanmarMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
TPAPanamaMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
UFNArgentina (Movistar)May 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
UPOUruguayMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
UYOUruguayMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
ZTABrazil (Claro)May 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
ZTMBrazil (TIM)May 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
ZTOBrazilMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
ZVVBrazil (Vivo)May 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
DORDominican RepublicMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWEIGZE1/A336MUBSIGZE1
CDRDominican RepublicMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWAIGZE1/A336MUBSIGZE1
CRCCosta RicaMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWAIGZE1/A336MUBSIGZE1
ECOEcuadorMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWAIGZE1/A336MUBSIGZE1
PGUGuatemalaMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWAIGZE1/A336MUBSIGZE1
CHEChile (Entel)May 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
CHLChile (Claro)May 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
CHOChileMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
CHTChile (Movistar)May 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1
CHXChileMay 26, 2026+1 dayA336MUBSIGZE1/A336MOWOIGZE1/A336MUBSIGZE1

Download and release notes

samloader download -m SM-A336M -r COM -v A336MUBSIGZE1/A336MOWAIGZE1/A336MUBSIGZE1

Samsung's release notes and security patch level for this update: SM-A336M / COM on doc.samsungmobile.com. What each part of the build number means: decode A336MUBSIGZE1.