Walk into any restaurant, doctor's office, repair shop or otherplace where people can sit for a few moments and you'll notice thatthe vast majority of them are on their cell phones. They sleep withthem by their bedsides, take them with them when they exercise andfeel naked if they forget their phones somewhere.

According to Pew Research, 90% of American adults now have acell phone and 58% of those are smartphones. Afraid that they mightmiss an important call or alert, 44% of cell owners sleep withtheir phones next to them in bed and 29% describe their phones assomething they can't live without. (These last two figures are froma 2012 report and could be considerably higher as of 2015.)

Of adults who have cell phones, 93% are males and 88% arefemales. Almost 90% of residents in both cities and suburbs owncell phones, and the numbers are similar regardless of education oreconomic level. Pew also says the majority of cell phone owners(81%) use their phones to send or receive text messages and toaccess the Internet (60%).