Archive contain Boot Unlocked and TWRP Material Play ported by megthebest!
Tested successfully with V10 June 2016 rom.
1- Download and Install correctly Mediatek Preloader drivers
( Take care on Windows 8.1/10 drivers, you need to disable driver signature before install:)
https://www.youtube.com/watch?v=50pD0mONm44
http://laurentiumihet.ro/technology/windows-10-mtk-vcom-usb-drivers-for-32-64-bit-drivers-installation-tutorial/
https://thebroodle.com/microsoft/windows/install-mediatek-mt65xx-usb-vcom-drivers-windows-8-8-1/
2- enter Engineering Mode MTK with Dialer code *#*#3646633#*#*, go into log and debugging, tap on user2root and tap on ROOT, shut down smartphone.
3- With flashtool load MT6735_Android_Scatter-Play.txt
4- Select download and connect smartphone to pc (smartphone must be powered off)… in few seconds will start the process and the new TWRP will be flashed.
3.1- To restore original stock recovery, you need load ad point 3 the file MT6735_Android_Scatter.txt
P.P.S to enter in the recovery, power off the smartphone, push VOL + and Power at the same time, you will see three words with VOL + you move selection, with VOL – you must select Recovery
To have root flash with TWRP the archive supersu.zip found here: https://download.chainfire.eu/696/supersu/
I'm not responsible for any damage to your phone, take care that after TWRP install and Root, you will not be able to receive OTA updates, for that you need to flash stock rom of remove TWRP e root (supersu)
This is not my work it is megthebest's work I only updated it so that it worked with the latest official firmware, please give all credit to him. Tested on my phone and it works. use at own risk.