A346MUBSHFZJ4 – Galaxy A34 5G firmware

Build A346MUBSHFZJ4 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 Oct 20, 2026 (method) and has reached 40 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 A346MUBSGFZG4 is blocked. Samsung still serves this file.

Model
SM-A346M
Android
Android 16
Type
Security
Bootloader bit
17
First released
Oct 20, 2026
Regions
40

Rollout timeline by region

The date each region code (CSC) first received A346MUBSHFZJ4, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
CGUGuatemala (Claro)Oct 20, 2026day 0A346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4
TPAPanamaOct 20, 2026day 0A346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
AROArgentinaOct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
BVOBoliviaOct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
COBColombia (Movistar)Oct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4
COLColombiaOct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4
COOColombiaOct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4
CTIArgentina (Claro)Oct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
EBEEcuadorOct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4
ECOEcuadorOct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4
GTOGuatemalaOct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
IUSMexico (AT&T)Oct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
MXOMexicoOct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
PEOPeruOct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4
PETPeru (Movistar)Oct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4
PNTPanamaOct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4
PSNArgentina (Personal)Oct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
SAMOceaniaOct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4
TCEMexico (Telcel)Oct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
TGPParaguayOct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
TMMMyanmarOct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
UFNArgentina (Movistar)Oct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
UPOUruguayOct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
UYOUruguayOct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
ZTABrazil (Claro)Oct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
ZTMBrazil (TIM)Oct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
ZTOBrazilOct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
ZVVBrazil (Vivo)Oct 27, 2026+7 daysA346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
CDRDominican RepublicOct 29, 2026+9 daysA346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
COMColombia (Claro)Oct 29, 2026+9 daysA346MUBSHFZJ4/A346MOWOHFZJ4/A346MUBSHFZJ4
CHEChile (Entel)Oct 29, 2026+9 daysA346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4
CHLChile (Claro)Oct 29, 2026+9 daysA346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4
CHOChileOct 29, 2026+9 daysA346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4
CHTChile (Movistar)Oct 29, 2026+9 daysA346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4
CHXChileOct 29, 2026+9 daysA346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4
CRCCosta RicaOct 29, 2026+9 daysA346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4
DORDominican RepublicOct 29, 2026+9 daysA346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4
GLONigeria (Glo)Oct 29, 2026+9 daysA346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4
NBSLatin America (open market)Oct 29, 2026+9 daysA346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4
PGUGuatemalaOct 29, 2026+9 daysA346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4

Download and release notes

samloader download -m SM-A346M -r CGU -v A346MUBSHFZJ4/A346MOWBHFZJ4/A346MUBSHFZJ4

Samsung's release notes and security patch level for this update: SM-A346M / CGU on doc.samsungmobile.com. What each part of the build number means: decode A346MUBSHFZJ4.