 Cell phones have been around since the mid-1980s. Do we still need a primer on their proper use? Apparently so. Here are some reminders. Use silent or vibrate mode in quiet environments like church. Be careful when capturing photos or videos in a public setting that involves bystanders. Respect people's privacy. No phones at the dinner table. No checking your phone during face-to-face conversations. Don't use the speakerphone in public.