after i flashed my w810 with a new firmware (using phoneXS , i dont remember which FW but i don't think it makes any difference) it started restarting randomly, especially when used a lot .
for example : i can't change like 5-6 themes consecutively without it restarting.
and by restarting i mean ... the screen suddenly goes White then black then white again then the menu appears and the phone is functional.
but it's not a full restart i think because it doesn't ask pe for the PIN code or the phone lock code, it just restarts.
thanks for any help