When in the car, I noticed that my Date and time would change to an hour later, a different month sometime in the year 2001. It happens as we go through low reception areas and I have to go into the settings and turn the auto on and off to get it to the correct settings. My husbands S7 doesnt do it but my S9+ does. When it happens, I cant use my phone till I reset it. This gets really annoying if I am playing a game or surfing the web (My husband is driving not me). what is going on????