On this page, you will find the official link to download Lenovo P770 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 P770 Stock Firmware (flash file)
File Name: Lenovo_P770_P54_MT6577.zip
File Size: 566 MB
How to Flash: Follow Tutorial