I wouldn't rule out an infection in that case. I have a friend who has phone malware that shows ads about every minute or so. I offered to help factory reset it

I wouldn't rule out an infection in that case. I have a friend who has phone malware that shows ads about every minute or so. I offered to help factory reset it (last I checked everything she wants to keep is automatically backed up to the cloud) but we just haven't gotten around to it. And yes she really does use her phone regularly.