📱 Device Information
Model: M366B
Firmware: M366BXXS4BZA3
Android: 16
Patch: B
Update: U4
Region: XX
Date: 16-02-2026
⚠️ Disclaimer: We are not responsible for any damage or risk to your device. All firmware files are official Samsung files and are not modified by us. Proceed at your own risk.
🔍 About This Firmware
Official Samsung firmware for Samsung M366B U4 (M366BXXS4BZA3) running Android 16 with security patch level B. This firmware package contains 4 files (BL, AP, CP, HOME_CSC) and can be used to restore, update, unbrick, or prepare your device.
- Restore device to official factory firmware
- Update to the latest Android 16 security patch
- Fix software issues, boot loops, and soft bricks
- Unbrick your Samsung device safely
🛠️ How to Flash This Firmware
- Download the firmware files for M366B U4 from the link above
- Extract the downloaded archive – you will find 4 files: BL, AP, CP, HOME_CSC
- Download and open Odin on your Windows PC
- Boot your M366B into Download Mode (Power Off, then hold Vol Down + Power)
- Connect your device to PC via USB cable
- In Odin, load each file in its correct slot: BL slot → BL file, AP slot → AP file, CP slot → CP file, CSC slot → HOME_CSC file
- Click Start and wait for the process to complete
- Your device will reboot automatically – do NOT disconnect during flashing
❓ Frequently Asked Questions
Is this the official Samsung firmware?
Yes, M366BXXS4BZA3 is the official Samsung firmware file for M366B. The files are sourced directly from Samsung servers and are not modified in any way.
Yes, M366BXXS4BZA3 is the official Samsung firmware file for M366B. The files are sourced directly from Samsung servers and are not modified in any way.
Will flashing this erase my data?
Using HOME_CSC preserves your data. If you use regular CSC, it will perform a factory reset. Always back up important files before any firmware operation.
Using HOME_CSC preserves your data. If you use regular CSC, it will perform a factory reset. Always back up important files before any firmware operation.
What are the 4 files?
BL = Bootloader, AP = Android Partition (main firmware), CP = Modem/Radio, HOME_CSC = Consumer Software Customization (keeps data).
BL = Bootloader, AP = Android Partition (main firmware), CP = Modem/Radio, HOME_CSC = Consumer Software Customization (keeps data).
What tool do I need?
You need Odin (Samsung flashing tool) on a Windows PC and a USB cable.
You need Odin (Samsung flashing tool) on a Windows PC and a USB cable.
