I once heard a similar argument in an academic meeting on philosophy, but for scissors, and have been thinking about it for phones for a while. It is a very interesting matter, and it is a very fine piece of writing!
(The argument is extended cognition, which the Stanford Encyclopaedia of Philosophy defines as: “The thesis of extended cognition is the claim that cognitive systems themselves extend beyond the boundary of the individual organism. On this view, features of an agent’s physical, social, and cultural environment can do more than distribute cognitive processing: they may well partially constitute that agent’s cognitive system. (Clark and Chalmers 1998, R. Wilson 2004; A. Clark 2008, Menary 2010).”)