Has anyone else's phone died after updating to the new Android OS?

[AC Question]

if smart phone dead by updating new android os ?

i am trying to update android kitkat os using flash tool . suddenly the phone is discontents after completion of 45% of os.

so, its not switch on now.i am keep on trying but the phone is not functioning
so what i want to do now.

and the phone is not showing in flash tool software , my computer panel too.
please help me.