Hi, glad to share this firmware fo Lenovo S8 A7600.
Download here: Lenovo S8 A7600 Android 5.0 Firmware
1. Decompress the package, find the Flash Tool.
2. Double click the flash tool application.
3. Click download, then you click Scatter-loading.
4. Open the firmware folder.
5. Click “MTXXXX Android scatter” txt file.
6. The interface will like the picture showing below.
7. Click Download.
8. Click your phone to computer via USB cable.
9. It will download automatically, when the progress bar is full, it means the flash is finished.