I’ve read a couple of Dean’s books and I don’t regret it, but also didn’t find them that good.
Outside a couple of disappointments, everything I’ve read from King has ranged from really good (Salems lot, tommyknockers, etc) to outstanding (the dark tower series, the tailsman).
I spoke with a dental hygienist in a hot tub once (that’s how you know this information is solid). She did say to avoid rinsing or mouthwash after brushing with fluoride toothpaste. She also wasn’t a huge fan of alcohol mouthwash in general as it kills both good and bad bacteria. Too bad because I really do enjoy the “burn” feeling when I use it.
If your concern is whether your cellphone carrier has the ability to see who you are calling and for how long, this is true whether you have a smartphone or a “regular” phone.