A346MUBSEEZB6 – Galaxy A34 5G firmware

Build A346MUBSEEZB6 is a security update for the Galaxy A34 5G (SM-A346M) on Android 16 (One UI 8). It first appeared on Samsung's servers on Mar 9, 2026 (method) and has reached 40 regions so far. It raises the bootloader bit from 13 to 14: once installed, the device no longer accepts firmware with bit 13 or lower, so a downgrade to A346MUBSDEZA1 is blocked. Samsung still serves this file.

Model
SM-A346M
Android
Android 16
Type
Security
Bootloader bit
14
First released
Mar 9, 2026
Regions
40

Rollout timeline by region

The date each region code (CSC) first received A346MUBSEEZB6, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
AROArgentinaMar 9, 2026day 0A346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
BVOBoliviaMar 9, 2026day 0A346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
CDRDominican RepublicMar 9, 2026day 0A346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
COMColombia (Claro)Mar 9, 2026day 0A346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
CTIArgentina (Claro)Mar 9, 2026day 0A346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
GTOGuatemalaMar 9, 2026day 0A346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
IUSMexico (AT&T)Mar 9, 2026day 0A346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
MXOMexicoMar 9, 2026day 0A346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
PSNArgentina (Personal)Mar 9, 2026day 0A346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
TCEMexico (Telcel)Mar 9, 2026day 0A346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
TMMMyanmarMar 9, 2026day 0A346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
TPAPanamaMar 9, 2026day 0A346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
UFNArgentina (Movistar)Mar 9, 2026day 0A346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
ZTABrazil (Claro)Mar 9, 2026day 0A346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
ZTMBrazil (TIM)Mar 9, 2026day 0A346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
ZTOBrazilMar 9, 2026day 0A346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
ZVVBrazil (Vivo)Mar 9, 2026day 0A346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
TGPParaguayMar 10, 2026+1 dayA346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
CGUGuatemala (Claro)Mar 10, 2026+1 dayA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6
UPOUruguayMar 10, 2026+1 dayA346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
UYOUruguayMar 10, 2026+1 dayA346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6
COBColombia (Movistar)Mar 10, 2026+1 dayA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6
COLColombiaMar 10, 2026+1 dayA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6
COOColombiaMar 10, 2026+1 dayA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6
CRCCosta RicaMar 10, 2026+1 dayA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6
DORDominican RepublicMar 10, 2026+1 dayA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6
EBEEcuadorMar 10, 2026+1 dayA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6
ECOEcuadorMar 10, 2026+1 dayA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6
GLONigeria (Glo)Mar 10, 2026+1 dayA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6
NBSLatin America (open market)Mar 10, 2026+1 dayA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6
PEOPeruMar 10, 2026+1 dayA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6
PETPeru (Movistar)Mar 10, 2026+1 dayA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6
PGUGuatemalaMar 10, 2026+1 dayA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6
PNTPanamaMar 10, 2026+1 dayA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6
SAMOceaniaMar 10, 2026+1 dayA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6
CHEChile (Entel)Apr 13, 2026+35 daysA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6
CHLChile (Claro)Apr 13, 2026+35 daysA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6
CHOChileApr 13, 2026+35 daysA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6
CHTChile (Movistar)Apr 13, 2026+35 daysA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6
CHXChileApr 13, 2026+35 daysA346MUBSEEZB6/A346MOWBEEZB6/A346MUBSEEZB6

Download and release notes

samloader download -m SM-A346M -r ARO -v A346MUBSEEZB6/A346MOWOEEZB6/A346MUBSEEZB6

Samsung's release notes and security patch level for this update: SM-A346M / ARO on doc.samsungmobile.com. What each part of the build number means: decode A346MUBSEEZB6.