My screen lights up 'by itself' around 7 PM most evenings. There is no ring or indication of a phone call. Later I will get a ding-dong indicating I have a voice mail. When I open the voice mail, there is nothing there. It used to turn off my sound, but has recently stopped doing so. But the phone becomes quite warm around this time. I have NORD VPN and Norton Mobile Security. However, I believe the voice mail is somehow involved in the bypass hack. Is there anyway to protect my S5 cell phone from voice mail hacking?