> Certain features like making and receiving calls, texting and so forth are used more often than taking pictures or searching maps.
I find that surprising. Maybe I'm just an edge case. I rarely make or receive calls on my 'phone' (maybe 2-3 times a month). Texts are much more common; at least 5 times a week.
Maps, however, are probably daily. My phone is basically a calendar, mapping, suggestion device.