Good afternoon, yesterday a trojan malware attacted my Phone.. appears publicitary page and erotic page.. (also when i enter in whatsapps for example).. i saw that the problem Can be the ROM.. i tried to remove by factory reset but malware is now locked but not removed.. i tried to change rom but it show that it is impossibile.. the installation of new rom is locked by trojan malware.. i'm not an informatic expert and i don't know how Can i solve this problem..