flashing my a3900 lenovo mobile
Since you didn't provide infos about the platform, I assume its the Mediatek version.

To flash this phone you'll need SP Flashtool and ROM file with scatter. You'll also need USB drivers which make it possible for your device to communicate with the computer. The phone needs to be connected in Preloader mode.


Downloaded SP Flashtool
Download MTK USB drivers
Download the Firmware