On this page, you will find the official link to download Lenovo Vibe B A2016a40 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 Vibe B A2016a40 Stock Firmware (flash file)
File Name: Lenovo_A2016a40_S235_MT6735_20170505.zip
File Size: 1 GB
How to Flash: Follow Tutorial