1- With flashtool load MT6753_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 ad point 1 the file MT6753_Android_Scatter- stock.txt
P.P.S to enter in the recovery, power off the smartphone, push VOL + and Power at the same time, you will see thre wordsm with VOL + you move selection, with VOL – you must select Recovery
TAKE CARE, ONLY FOR Ulefone Be Touch 3
Download: TWRP Ulefone Be Touch 3
Flashtool 5.1532 Windows
Driver Mediatek Auto Installer