I can answer this.
Up until about a year ago, I had a no frills pay-as-you-go cell phone. I had it with me some of the time. I would need to remember to leave the house with it if I needed it that day. It was a bit of big deal to make sure it was charged/sound on/with me. I lost it in the bottom of bags for days or weeks and wouldn't notice it was missing until it had run out of batteries and then it was extra hard to find because I couldn't call it. It was useful a few times a month and worth the $10/month I paid for it. My husband had a similiar phone.
Then I bought top of the line smartphones for us. Now my phone is always with me. It is my camera, my email, my texting, my maps, my clock, my cooking timer, my internet surfer (though I am on my laptop right now as it is easier for typing) my flashlight, my backup hard drive, my video player, studfinder, pedometer, game player, ereader, Netflix viewed, bus schedule, library catalouge etc.... I check it all-the-time. Because I use it for everything and all the time, any annoyance of keeping it with me is negated. I set it up with a tracker so I can find it from my husband's phone or from my laptop and it is never missing for more than a couple hours (usually on a shelf in the house somewhere). It is next to me in the house, in my bag at school, in my purse or the counsel in the car, in my hands in the bus, in my pocket when walking...etc...
