Requirements:-First, and most important, you need some drivers to install for MTK preload to work, if you have windows 10 it wont work! I try on win7 and installation goes well.
PDAnet drivers doesn`t work with this problem, because you can`t turn on USB debugging ON on phone. Driver
3.Download and extract SP-Flash-Tool-v5.1532.00 (only this version works with my phone without any errors)
FLASHING: – Install drivers
- Then open flash tool.
- Extract ROM to desktop and find scatter file in flashtool.
- Choose update firmware and FIRST press DOWNLOAD button and AFTER THAT CONNECT PHONE TO USB, REMEMBER THAT IF YOU CHOSE “FORMAT ALL+DOWNLOAD” YOU WILL LOSE YOUR IMEI! I BACK MY IMEI ON EVERY PHONE FIRST DAY WHEN I GET IT AND THAT’S REALY GOOD FOR THIS CASE SCENARIO.
- AFTER FLASHING IF YOU STILL GET RED LIGHT, PUT PHONE ON ORIGINAL CHARGER AND AFTER 15-20 MIN TRY TO PRESS POWER MORE 10 SEC , PHONE SHOULD BE VIBRATE AND POWER UP FEW SECONDS!
Source – Letv Forum