On this page, you will find the official link to download Lenovo S660 Stock Firmware ROM (flash file) on your Computer. Firmware comes in a zip package, which contains Flash File, Flash Tool, Driver and How-to Manual.
Download Lenovo S660 Stock Firmware (flash file)
File Name: Lenovo_S660_MT6582_S029_140228.zip
File Size: 969 MB
How to Flash: Follow Tutorial