i was using my phone normally and suddenly i dnt know what happend i saw my phone root itself and seenin nonsense ads n downloading apps which i didnt even as to.. i tried factory reseting it didnt go...later i found it was a trogen called ghost push trojan..wat should i do??can i just update my andriod with the stock rom will it go?? cm security didnt help.. plz help me out tq in advance