Before you begin:

1. Backup your important data as the process may erase everything on your device.
2. Ensure that your device has sufficient battery life or connect it to a power source.
3. Download the correct firmware for your Vivo Y1s model from the official Vivo website.

Flashing Process:

1. Install USB Drivers:

   • Make sure that Vivo USB drivers are installed on your computer. You can usually find these drivers on the official Vivo website.

2. Download SP Flash Tool:

   • SP Flash Tool is a commonly used tool for flashing MediaTek-based devices like many Vivo phones. Download it from a trusted source.

3. Extract Firmware Files:

   • Extract the firmware files you downloaded earlier to a location on your computer.

4. Open SP Flash Tool:

   • Run the SP Flash Tool on your computer.

5. Load Scatter File:

   • In SP Flash Tool, click on “Scatter-loading” and select the scatter file from the extracted firmware files.

6. Power Off Your Device:

   • Turn off your Vivo Y1s completely.

7. Connect the Device:

   • Connect your device to the computer using a USB cable. Make sure the device is powered off.

8. Start the Flashing Process:

   • Click on the “Download” button in SP Flash Tool to start the flashing process. The tool will begin flashing the firmware to your device.

9. Wait for Completion:

   • Patiently wait for the flashing process to complete. Do not disconnect your device during this time.

10. Completion Message:

    • Once the process is complete, you should see a green circle or a success message in SP Flash Tool.

11. Disconnect and Power On:

    • Disconnect your device from the computer and power it on.

NOTE:

• This guide assumes you are using SP Flash Tool for a MediaTek-based device like the Vivo Y1s. If your device has a different chipset, you might need a different flashing tool.

Remember that these instructions are based on general steps for flashing Vivo devices. The exact steps might vary slightly based on the specific firmware and version you’re using. So we can’t take responsibility for these instructions. Always refer to the official documentation and resources for your device and tools.