Please help! I believe my phone has been rooted. It started 3 phones ago with my Samsung S8. Factory reset and everything....finally took it to Verizon and they told me it had been rooted.... I did everything I could before I smashed it and switched to TMobile with a new phone, new sim card, new sd cards, new number. Had the new phone for a week before it started acting funny too. That phone is a LG G8ThinQ & I have also been using a Samsung J3 because the LG screen is all messed up. Both of them are doing the same things. Files delete, system settings change, apps appear and disappear,  bluetooth and wifi come on automatically... I am not very good with the phones but I have gotten some knowledge from just reading everything for the past 3 months. This is driving me insane.  Please help.