For me its two factor authentication at work. The building was constructed in such a way that there is somehow no cell service at all in the building. I had a s

For me its two factor authentication at work. The building was constructed in such a way that there is somehow no cell service at all in the building. I had a smartphone all this time but not the actual two factor app, I would have it call my phone and do a keypress but that only worked when I was working from home. When I go into the office, those calls don't go through, neither does texting a list of codes. There are other things in life that are certainly a lot more convenient with a smart phone. I rely on public transit, bussing and trains, and if I didn't have a smartphone that would make it a lot more difficult to navigate. Sure I could pull up a paper map of the bus routes and estimate what routing might be the most optimal to get to my destination by hand, and call up the transit agency operator line with my buss stop ID to ask when the next bus is slated to appear, but its infinitely easier to just use google maps and be done with it. When I am on the first bus and anticipating transferring to another bus, unless I knew that bus stop ID for the transfer point ahead of time I cannot call ahead and know when my transfer bus is arriving, for example.