Do no research! Take your phone out, put it by a sheet of paper, and think about a single specific communications act:
making a call to someone
or SMS / iMessage
Now draw out a map of how that happens, inside and outside the phone. Don’t worry about being correct or technically accurate, but get as detailed as you can. The goal is to produce a map of your subjective understanding of what is happening. You can organize it temporally or spatially, using whatever graphic technique is useful for expressing your concepts.