A346BXXSHFZJ4 – Galaxy A34 5G firmware

Build A346BXXSHFZJ4 is a security update for the Galaxy A34 5G (SM-A346B) on Android 16 (One UI 8). It first appeared on Samsung's servers on Oct 18, 2026 (method) and has reached 18 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 A346BXXSGFZG4 is blocked. Samsung still serves this file.

Model
SM-A346B
Android
Android 16
Type
Security
Bootloader bit
17
First released
Oct 18, 2026
Regions
18

Rollout timeline by region

The date each region code (CSC) first received A346BXXSHFZJ4, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
BOGFrance (Bouygues)Oct 18, 2026day 0A346BXXSHFZJ4/A346BOXMHFZJ4/A346BXXSHFZJ4
BTBUnited Kingdom (BT)Oct 18, 2026day 0A346BXXSHFZJ4/A346BOXMHFZJ4/A346BXXSHFZJ4
EUXEurope (Multi-CSC)Oct 18, 2026day 0A346BXXSHFZJ4/A346BOXMHFZJ4/A346BXXSHFZJ4
EUYEurope (Multi-CSC)Oct 18, 2026day 0A346BXXSHFZJ4/A346BOXMHFZJ4/A346BXXSHFZJ4
EVRUnited Kingdom (EE)Oct 18, 2026day 0A346BXXSHFZJ4/A346BOXMHFZJ4/A346BXXSHFZJ4
MEOPortugal (MEO)Oct 18, 2026day 0A346BXXSHFZJ4/A346BOXMHFZJ4/A346BXXSHFZJ4
MOBAustria (A1)Oct 18, 2026day 0A346BXXSHFZJ4/A346BOXMHFZJ4/A346BXXSHFZJ4
MOTSlovenia (Telekom)Oct 18, 2026day 0A346BXXSHFZJ4/A346BOXMHFZJ4/A346BXXSHFZJ4
MSRSerbiaOct 18, 2026day 0A346BXXSHFZJ4/A346BOXMHFZJ4/A346BXXSHFZJ4
O2CCzech Republic (O2)Oct 18, 2026day 0A346BXXSHFZJ4/A346BOXMHFZJ4/A346BXXSHFZJ4
PLSPoland (Plus)Oct 18, 2026day 0A346BXXSHFZJ4/A346BOXMHFZJ4/A346BXXSHFZJ4
PRTPoland (Play)Oct 18, 2026day 0A346BXXSHFZJ4/A346BOXMHFZJ4/A346BXXSHFZJ4
SFRFrance (SFR)Oct 18, 2026day 0A346BXXSHFZJ4/A346BOXMHFZJ4/A346BXXSHFZJ4
SIMSlovenia (A1)Oct 18, 2026day 0A346BXXSHFZJ4/A346BOXMHFZJ4/A346BXXSHFZJ4
TIMItaly (TIM)Oct 18, 2026day 0A346BXXSHFZJ4/A346BOXMHFZJ4/A346BXXSHFZJ4
VIPCroatia (A1)Oct 18, 2026day 0A346BXXSHFZJ4/A346BOXMHFZJ4/A346BXXSHFZJ4
SWCSwitzerlandOct 18, 2026day 0A346BXXSHFZJ4/A346BOXMHFZJ4/A346BXXSHFZJ4
TOPSerbia/MontenegroOct 18, 2026day 0A346BXXSHFZJ4/A346BOXMHFZJ4/A346BXXSHFZJ4

Download and release notes

samloader download -m SM-A346B -r EUX -v A346BXXSHFZJ4/A346BOXMHFZJ4/A346BXXSHFZJ4

Samsung's release notes and security patch level for this update: SM-A346B / EUX on doc.samsungmobile.com. What each part of the build number means: decode A346BXXSHFZJ4.