What do you use your smartphone for most of the time?
Off the top of my head, I say I use my phone for texting and checking Twitter. A close second comes reading ebooks. Making phone calls comes in third, at best, that is.
We probably do not need a study to tell us that many people do not use their smartphones to make a lot of phone calls, but in case you like having proof to back up your statements, there is this study conducted by O2, one of the leading UK mobile networks.