On this page, you will find the official link to download Lenovo A859 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 A859 Stock Firmware (flash file)
File Name: Lenovo_A859_S117_MT6582_20140219.zip
File Size: 1 GB
How to Flash: Follow Tutorial