1- phone started to hang a lot.
2- unless i push power button and re press it, phone remains hanged.
3- i tried flashing 4.4.2 but it stucks at boot loader screen as well and certainly i can't use power button to un freeze it.
4- phone starts well sometimes but there is no display but only colorful dots instead of screen, if i press and re press power button, start screen comes back.
plz help me to find a way so i can flash back some earlier android version.