JIAYU S3 Basic firmware download link: https://mega.co.nz/#...jBMxv71fhjjOINA
JIAYU S3 Advanced firmware download link: https://mega.co.nz/#...kitiy_6Kajm7m_c
JIAYU S3 Basic and JIAYU S3 Advanced flash tool: https://mega.co.nz/#...J8i7p0rU-kbopnE
JIAYU S3 Advanced firmware download link: https://mega.co.nz/#...kitiy_6Kajm7m_c
JIAYU S3 Basic and JIAYU S3 Advanced flash tool: https://mega.co.nz/#...J8i7p0rU-kbopnE
Before flash " international rom", you need to download the firmware and flash tool, below is the user manual:
SP_Flash_Tool_exe_v3.1424.0.0 manual
Run the file of Flash_tool.exe in the tool folder
SP_Flash_Tool_exe_v3.1424.0.0 manual
Run the file of Flash_tool.exe in the tool folder

1.Run Flash Tool,click Scatter –loading to choose the file of Scatter in the rom,and then click D or double click the file:

2.Click “Download Only”,to choose“Firmware-upgrade”。

To check

Click options-----download----Check DA DL All with checksum

Click download

Then turn off the phone and connect to the computer, then it will download to the phone