How to install Firmware using Sunstone Bfloader

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In this article, we will guide you through installing stock firmware on Samsung FeaturePhone devices using the Sunstone Bfloader.

Sunstone Bfloader

What is the Sunstone Bfloader?

Sunstone Bfloader is an official ST-Ericsson flashing utility that helps users flash or install stock firmware on Samsung FeaturePhone devices.

What is Stock Firmware?

Stock firmware refers to the original operating system (OS) pre-installed on a mobile device when it leaves the factory. It’s a tailored version of the OS, customized by the manufacturer to incorporate its unique user interface (UI), proprietary features, and pre-installed applications.

How to Install Stock Firmware Using Sunstone Bfloader

Installing the necessary drivers and tools before installing or flashing stock firmware using the Sunstone Bfloader is important.

Prerequisites

  • Charge your device to at least 40-50%.
  • A working Windows PC/Laptop and a USB Cable.
  • Take a complete Backup of your Device.
  • Download and install Sunstone Driver.
  • Download and extract Sunstone Bfloader.
  • Stock Firmware of the device.

Disclaimer: androidmtk.com shall not be held liable for any damage incurred to your device during or after following this guide. Proceed with caution and at your own risk.

Steps to install stock Firmware using Sunstone Bfloader

  1. Launch the Bfloader Tool by double-clicking on the bfloader.exe file (found inside the Sunstone Bfloader Tool folder).
    2. Launch Bfloader
  2. Once the Bfloader Tool is launched, Click the Set Model button.
    3. Sunstone Bfloader Set Model
  3. Locate the .mdl file (found inside the firmware folder).
    4. Sunstone Bfloader Select MDL
  4. Click the Main Partition Table button.
    5. Sunstone Bfloader Select Partition
  5. Click on the Browse button.
    6. Sunstone Bfloader Browse
  6. Locate the .ptt file (found inside the firmware folder).
    7. Sunstone Bfloader Select PTT
  7. Click on the OK button.
    8. Sunstone Bfloader Select PTT OK
  8. Click the CSC Partition Table button.
    9. Sunstone Bfloader CSC Partition
  9. Click on the Browse button.
    10. Sunstone Bfloader Browse
  10. Locate the csc .ptt file (found inside the firmware folder).
    11. Sunstone Bfloader Select CSC PTT
  11. Click on the OK button.
    12. Sunstone Bfloader Select PTT OK
  12. Power off your device and connect it to your computer using the USB cable.

    13. Mobile Connected Computer

    ☝Pro Tip: Press and hold the device boot key while connecting the USB cable to the computer. The boot key varies per device. You can find your device’s boot key by doing a Google Search.

  13. Click on the Start button to begin the Flashing process.
    14. Sunstone Bfloader Start Flash
  14. Once the flashing process is completed, you will receive a Flash Success Message.
    15. Sunstone Bfloader Flash Success

    Congratulations! You have successfully flashed the stock firmware. Close the Bfloader Tool, disconnect your device from the computer, and restart it.

Notes

  1. Initial Boot Process: Following the flashing procedure, your device will undergo an initial boot process, which may take 10 seconds to 1 minute. Once completed, you will be prompted to choose the device language and other details, similar to setting up a new device.
  2. Caution: Back up your data before using the Bfloader Tool. Your data will be permanently removed during the flashing/installation process.
  3. Credits: ST-Ericsson developed and distributed the Bfloader Tool. The company is thanked for providing the free application.

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