A057FXXUCDZB1 – Galaxy A05s firmware

Build A057FXXUCDZB1 is a feature update for the Galaxy A05s (SM-A057F) on Android 15 (One UI 7). It first appeared on Samsung's servers on Feb 22, 2026 (method) and has reached 37 regions so far. It raises the bootloader bit from 11 to 12: once installed, the device no longer accepts firmware with bit 11 or lower, so a downgrade to A057FXXSBDYJ1 is blocked. Samsung still serves this file.

Model
SM-A057F
Android
Android 15
Type
Feature
Bootloader bit
12
First released
Feb 22, 2026
Regions
37

Rollout timeline by region

The date each region code (CSC) first received A057FXXUCDZB1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
THLThailandFeb 22, 2026day 0A057FXXUCDZB1/A057FOLMCDZB1/A057FXXUCDZB1
XXVVietnamFeb 22, 2026day 0A057FXXUCDZB1/A057FOLMCDZB1/A057FXXUCDZB1
GLBPhilippines (Globe)Feb 25, 2026+3 daysA057FXXUCDZB1/A057FOLMCDZB1/A057FXXUCDZB1
MYMMyanmarFeb 25, 2026+3 daysA057FXXUCDZB1/A057FOLMCDZB1/A057FXXUCDZB1
XIDIndonesiaFeb 25, 2026+3 daysA057FXXUCDZB1/A057FOLECDZB1/A057FXXUCDZB1
XMEMalaysiaFeb 25, 2026+3 daysA057FXXUCDZB1/A057FOLMCDZB1/A057FXXUCDZB1
XNZNew ZealandFeb 25, 2026+3 daysA057FXXUCDZB1/A057FOLMCDZB1/A057FXXUCDZB1
XSPSingaporeFeb 25, 2026+3 daysA057FXXUCDZB1/A057FOLMCDZB1/A057FXXUCDZB1
XTCPhilippinesFeb 25, 2026+3 daysA057FXXUCDZB1/A057FOLMCDZB1/A057FXXUCDZB1
VAUAustralia (Vodafone)Feb 26, 2026+4 daysA057FXXUCDZB1/A057FOLMCDZB1/A057FXXUCDZB1
XSAAustraliaFeb 26, 2026+4 daysA057FXXUCDZB1/A057FOLMCDZB1/A057FXXUCDZB1
ILOIsraelMar 3, 2026+9 daysA057FXXUCDZB1/A057FOJMCDZB1/A057FXXUCDZB1
KSASaudi ArabiaMar 3, 2026+9 daysA057FXXUCDZB1/A057FOJMCDZB1/A057FXXUCDZB1
LYSLibyaMar 3, 2026+9 daysA057FXXUCDZB1/A057FOJMCDZB1/A057FXXUCDZB1
MIDMiddle EastMar 3, 2026+9 daysA057FXXUCDZB1/A057FOJMCDZB1/A057FXXUCDZB1
MWDMoroccoMar 3, 2026+9 daysA057FXXUCDZB1/A057FOJMCDZB1/A057FXXUCDZB1
PAKPakistanMar 3, 2026+9 daysA057FXXUCDZB1/A057FOJMCDZB1/A057FXXUCDZB1
PKDPakistanMar 3, 2026+9 daysA057FXXUCDZB1/A057FOJMCDZB1/A057FXXUCDZB1
TUNTunisiaMar 3, 2026+9 daysA057FXXUCDZB1/A057FOJMCDZB1/A057FXXUCDZB1
TURTurkeyMar 3, 2026+9 daysA057FXXUCDZB1/A057FOJMCDZB1/A057FXXUCDZB1
XFASouth AfricaMar 3, 2026+9 daysA057FXXUCDZB1/A057FOJMCDZB1/A057FXXUCDZB1
XFESouth AfricaMar 3, 2026+9 daysA057FXXUCDZB1/A057FOJMCDZB1/A057FXXUCDZB1
XFVSouth Africa (Vodacom)Mar 3, 2026+9 daysA057FXXUCDZB1/A057FOJMCDZB1/A057FXXUCDZB1
ACRGhanaMar 3, 2026+9 daysA057FXXUCDZB1/A057FOJMCDZB1/A057FXXUCDZB1
AFGAfghanistanMar 3, 2026+9 daysA057FXXUCDZB1/A057FOJMCDZB1/A057FXXUCDZB1
AFRAfricaMar 3, 2026+9 daysA057FXXUCDZB1/A057FOJMCDZB1/A057FXXUCDZB1
DKRSenegalMar 3, 2026+9 daysA057FXXUCDZB1/A057FOJMCDZB1/A057FXXUCDZB1
ECTNigeriaMar 3, 2026+9 daysA057FXXUCDZB1/A057FOJMCDZB1/A057FXXUCDZB1
EGYEgyptMar 3, 2026+9 daysA057FXXUCDZB1/A057FOJMCDZB1/A057FXXUCDZB1
XSGUnited Arab EmiratesMar 3, 2026+9 daysA057FXXUCDZB1/A057FOJMCDZB1/A057FXXUCDZB1
CAUCaucasusMar 3, 2026+9 daysA057FXXUCDZB1/A057FOXECDZB1/A057FXXUCDZB1
SERRussiaMar 3, 2026+9 daysA057FXXUCDZB1/A057FOXECDZB1/A057FXXUCDZB1
SKZKazakhstanMar 3, 2026+9 daysA057FXXUCDZB1/A057FOXECDZB1/A057FXXUCDZB1
BKDBangladeshMar 4, 2026+10 daysA057FXXUCDZB1/A057FODMCDZB1/A057FXXUCDZB1
INSIndiaMar 4, 2026+10 daysA057FXXUCDZB1/A057FODMCDZB1/A057FXXUCDZB1
NPBNepalMar 4, 2026+10 daysA057FXXUCDZB1/A057FODMCDZB1/A057FXXUCDZB1
SLKSri LankaMar 4, 2026+10 daysA057FXXUCDZB1/A057FODMCDZB1/A057FXXUCDZB1

Download and release notes

samloader download -m SM-A057F -r INS -v A057FXXUCDZB1/A057FODMCDZB1/A057FXXUCDZB1

Samsung's release notes and security patch level for this update: SM-A057F / INS on doc.samsungmobile.com. What each part of the build number means: decode A057FXXUCDZB1.