Hi, here is the latest firmware of LeTV LeEco Le 2 X620 Helio X20 MT6797 Android 6.0 Smartphone
Download here: LeTV LeEco Le 2 X620 Helio X20 MT6797 Android 6.0 Smartphone Firmware
Password: geekbuying.com
You can also refer to this flash guide: How to flash MTK smartphones with SP flash tool?
Enjoy!