A566EXXSDCZHC – Galaxy A56 5G firmware

Build A566EXXSDCZHC is a security update for the Galaxy A56 5G (SM-A566E) on Android 16 (One UI 8). It first appeared on Samsung's servers on Sep 2, 2026 (method) and has reached 4 regions so far. It raises the bootloader bit from 12 to 13: once installed, the device no longer accepts firmware with bit 12 or lower, so a downgrade to A566EXXSCCZG7 is blocked. Samsung still serves this file.

Model

SM-A566E

Android

Android 16

Type

Security

Bootloader bit

13

First released

Sep 2, 2026

Regions

4

Rollout timeline by region

The date each region code (CSC) first received A566EXXSDCZHC, counted from the first release.

Download and release notes

samloader download -m SM-A566E -r INS -v A566EXXSDCZHC/A566EODMDCZHC/A566EXXSDCZHB

Samsung's release notes and security patch level for this update: SM-A566E / INS on doc.samsungmobile.com. What each part of the build number means: decode A566EXXSDCZHC.