On this page, you will find the official link to download Lenovo A399 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 A399 Stock Firmware (flash file)
File Name: Lenovo_A399_MT6582_S023_141016.zip
File Size: 537 MB
How to Flash: Follow Tutorial