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/
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Download Flashtool and unpack it in a directory.
1- With flashtool load MT6735M_Android_Scatter TWRP.txt
2- 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.
To restore original stock recovery, you need load at point 1 the file MT6735M_Android_Scatter.txt
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 have to select Recovery
Allow changes and swype to the right when you are in first splash screen of Twrp and requested that.
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