Quite honestly I don't know the Android version. Months ago I sent my phone to Asurion for a cracked screen. I didn't factory reset the phone because of ignorance. I didn't have a screen lock to open the phone. I just recently realized that factory reset would have been smart for obvious reasons, but it's too late for that now. I guess I'm just paranoid about someone having access to my phone once the screen was replaced. That is the reason for inquiring about the security of Private Mode. From what I understand it operates similar to Secure Folder, but it doesn't have Samsung Knox.