I remember in the dim and distant past ie the late 80s, when mobile phones were a real novelty.
A colleague described the excitement in her train carriage when her mobile rang and she picked it up to answer it. The entire carriage fell silent to listen in to what was surely going to be a Very Important Call. World Peace or somesuch.
So, my colleague pinned the phone to her ear, listened hard to what the caller had to say, ready to respond appropriately.
It was hubby, asking what he should do about supper.
To the awe and amazement of the entire carriage she announced, "I think baked beans would be best."
I would put 90% of mobile phone conversations in that category still.