Nagawa ko to. Vol down + power lang. Hold mo hanggang lumabas yung factory mode. Wag kang kukurap kasi kailangan mabitawan mo agad once lumabas yung factory mode. Or else magrereboot lang ulit. Then pag nasa factory mode ka na makikita mo mga menu in chinese letters, scroll down mo hanggang sa pinakababang option using vol down. Then choose it using vol up. Lalabas yung android logo na butas yung tiyan click mo mabilis volume down tuloy tuloy lang hanggang sa magreset. Voila! Sana makatulong 100% working!
Ito working sakin. yung pinaka babang options lang piliin nyo. in chinese character yun yung hard reset nya. thanks for sharing this solution.