A566EXXSECZI3 – Galaxy A56 5G firmware
Build A566EXXSECZI3 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 16, 2026 (method) and has reached
4 regions so far. It keeps bootloader bit 14, so downgrading to the previous build A566EXXSECZI2 is still possible. Samsung still serves this file.
- Model
- SM-A566E
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 14
- First released
- Sep 16, 2026
- Regions
- 4
Rollout timeline by region
The date each region code (CSC) first received A566EXXSECZI3, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
BKD | Bangladesh | Sep 16, 2026 | day 0 | A566EXXSECZI3/A566EODMECZI3/A566EXXSECZI2 |
INS | India | Sep 16, 2026 | day 0 | A566EXXSECZI3/A566EODMECZI3/A566EXXSECZI2 |
NPB | Nepal | Sep 16, 2026 | day 0 | A566EXXSECZI3/A566EODMECZI3/A566EXXSECZI2 |
SLK | Sri Lanka | Sep 16, 2026 | day 0 | A566EXXSECZI3/A566EODMECZI3/A566EXXSECZI2 |
Download and release notes
samloader download -m SM-A566E -r INS -v A566EXXSECZI3/A566EODMECZI3/A566EXXSECZI2Samsung'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 A566EXXSECZI3.