A066BXXS7CZF2 – Galaxy A06 5G firmware

Build A066BXXS7CZF2 is a security update for the Galaxy A06 5G (SM-A066B) on Android 16 (One UI 8). It first appeared on Samsung's servers on Jun 17, 2026 (method) and has reached 13 regions so far. It raises the bootloader bit from 6 to 7: once installed, the device no longer accepts firmware with bit 6 or lower, so a downgrade to A066BXXU6CZE6 is blocked. Samsung still serves this file.

Model
SM-A066B
Android
Android 16
Type
Security
Bootloader bit
7
First released
Jun 17, 2026
Regions
13

Rollout timeline by region

The date each region code (CSC) first received A066BXXS7CZF2, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
INSIndiaJun 17, 2026day 0A066BXXS7CZF2/A066BODM7CZF2/A066BXXS7CZF2
AFRAfricaJun 22, 2026+5 daysA066BXXS7CZF2/A066BOJV7CZF2/A066BXXS7CZF2
DKRSenegalJun 22, 2026+5 daysA066BXXS7CZF2/A066BOJV7CZF2/A066BXXS7CZF2
ECTNigeriaJun 22, 2026+5 daysA066BXXS7CZF2/A066BOJV7CZF2/A066BXXS7CZF2
XFASouth AfricaJun 22, 2026+5 daysA066BXXS7CZF2/A066BOJV7CZF2/A066BXXS7CZF2
XIDIndonesiaJun 22, 2026+5 daysA066BXXS7CZF2/A066BOLM7CZF4/A066BXXS7CZF2
GLBPhilippines (Globe)Jun 22, 2026+5 daysA066BXXS7CZF2/A066BOLM7CZF3/A066BXXS7CZF2
THLThailandJun 22, 2026+5 daysA066BXXS7CZF2/A066BOLM7CZF3/A066BXXS7CZF2
XMEMalaysiaJun 22, 2026+5 daysA066BXXS7CZF2/A066BOLM7CZF3/A066BXXS7CZF2
XTCPhilippinesJun 22, 2026+5 daysA066BXXS7CZF2/A066BOLM7CZF3/A066BXXS7CZF2
XXVVietnamJun 22, 2026+5 daysA066BXXS7CZF2/A066BOLM7CZF3/A066BXXS7CZF2
XNZNew ZealandJun 28, 2026+11 daysA066BXXS7CZF2/A066BOLM7CZF3/A066BXXS7CZF2
XSPSingaporeJun 28, 2026+11 daysA066BXXS7CZF2/A066BOLM7CZF3/A066BXXS7CZF2

Download and release notes

samloader download -m SM-A066B -r INS -v A066BXXS7CZF2/A066BODM7CZF2/A066BXXS7CZF2

Samsung's release notes and security patch level for this update: SM-A066B / INS on doc.samsungmobile.com. What each part of the build number means: decode A066BXXS7CZF2.