M066BXXS8CZI1 – Galaxy M06 5G firmware
Build M066BXXS8CZI1 is a security update for the Galaxy M06 5G (SM-M066B)
on Android 16 (One UI 8). It first appeared on Samsung's servers on Sep 28, 2026 (method) and has reached
2 regions so far. It raises the bootloader bit from 7 to 8: once installed, the device no longer accepts firmware with bit 7 or lower, so a downgrade to M066BXXS7CZF2 is blocked. Samsung still serves this file.
- Model
- SM-M066B
- Android
- Android 16
- Type
- Security
- Bootloader bit
- 8
- First released
- Sep 28, 2026
- Regions
- 2
Rollout timeline by region
The date each region code (CSC) first received M066BXXS8CZI1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
BNG | Belgium | Sep 28, 2026 | day 0 | M066BXXS8CZI1/M066BODM8CZI1/M066BXXS8CZI1 |
INS | India | Sep 28, 2026 | day 0 | M066BXXS8CZI1/M066BODM8CZI1/M066BXXS8CZI1 |
Download and release notes
samloader download -m SM-M066B -r INS -v M066BXXS8CZI1/M066BODM8CZI1/M066BXXS8CZI1Samsung's release notes and security patch level for this update: SM-M066B / INS on doc.samsungmobile.com. What each part of the build number means: decode M066BXXS8CZI1.