While holding the Volume Down (or Up) key as a boot key, connect your phone to the PC via USB.

on your PC so the computer can communicate with the phone in "Boot Mode". : A high-quality USB data cable and a Windows PC. Step-by-Step Flashing Guide

are the most reliable tools for reading and writing firmware. USB Drivers : Install the MTK VCOM USB Drivers

: Flashing will wipe all internal storage. Backup your contacts and messages.