mpeirce
Thinks s/he gets paid by the post
Of course people are moving to the new technology but it is not yet the case that "most calls take place between smartphones".
I could see it taking less than thirty years, but probably not less than ten years.
Well lets see.
Less than half of households even have landlines any more
Only About 40 Percent of US Households Still Have Landlines | Digital Trends
Roughly 2/3rds of American adults own a smart phone
6 facts about Americans and their smartphones | Pew Research Center