Sounds like the people at the ball field is using a Cell Blocker the keep ringing phones from distracting the players. They also did that when blasting for the new road... afraid the blast would be set off by a cell phone. But the only thing I noticed during those times I still had WiFi & could with my phone send & receive calls. So should be the same for the reader. As for the ads IF you have them they don't show up when your reading. They show when in sleep mode instead of the Dead Authors. & they are at the bottom of the pages that list the books on it. But once you pick a book to read they don't show. I love them got some great deals over the years