Over the years I've been using my smart phone more and more for non-phone activities. I use it a lot for travel, i.e., airline apps, hotel apps, train apps, etc. It's also extremely useful in China (Alipay & WeChat). Then of course, email, and other useful apps such as a compass, levelling app, weather, paying for parking, and news apps. Oh, and who can forget maps? I use the phone a ton for navigating when driving, and sometimes even walking.