The phone makes you present and unreachable at once
To your cat, a phone call is a strange event. You are sitting right there, clearly awake, talking in the animated voice she associates with social engagement — yet the conversation is not with her, the other participant has no smell, no body, and never arrives, and her usual ways of joining in, rubbing against you or settling on your lap, do not change the flow at all. From her perspective your attention has been captured by an invisible rival for an unknown duration. Cats are patient about many things, but an owner who is home, idle-handed, and inexplicably unresponsive is a problem her instincts tell her to solve. The misbehaviour starts as problem-solving: she escalates through her repertoire until something makes you react, look at her, speak to her, or get up — and at that moment the call, briefly, loses.
Why scratching, yowling, and knocking things, specifically
The chosen crimes are not random; they are the three loudest levers she owns. Scratching furniture is visible, audible, and known to be forbidden, which makes it the fastest way to be noticed from across a room. Yowling competes with the phone directly on its own channel — your voice is occupied, so hers fills the gap, and many cats time their loudest contributions to your pauses, which makes calls genuinely hard to sustain. Knocking objects down adds movement and risk: a sliding item near an edge forces a decision, because ignoring a scratch costs nothing but ignoring a teetering mug may cost the mug. Each behaviour on your calls has a reinforcement history behind it. If even once in ten calls you have paused to move her, scold her, or apologise to your caller while stroking her quiet, she has learned the behaviours work — eventually, which is exactly the schedule that makes habits stubborn.
Setting her up before the call starts
The fix is preparation rather than mid-call discipline, which almost always fails and entertains her besides. If you know a long call is coming, run five to ten minutes of interactive play first, so she starts the call in a post-hunt settle rather than at peak availability. As you sit down, put down a puzzle feeder, a lick mat, or a cardboard box with scrunched paper and a few treats hidden inside — occupation she can work on within sight of you, because being near you is much of what she wants. Take calls, where you can, in the room where her perch and toys already live, rather than retreating to a bare room that offers her nothing but you and the furniture. If she does begin a performance, a flat, boring non-response — no eye contact, no commentary to the caller about her — starves it faster than any telling-off.
Working from home with a feline colleague
For people whose calls run all day, build the pattern into the working day itself rather than negotiating call by call: play and feed before the first meeting block, refresh the puzzle or box at lunch, and keep a cat bed on or beside the desk so her chosen spot is one you can live with. Some cats settle remarkably once lap access during calls is simply permitted, with a blanket protecting your clothes, since proximity was the demand all along. Rule out the exceptions before assuming manipulation: a cat whose yowling on calls is new and also happening at night, or whose scratching targets herself rather than the sofa, needs a vet's view, because discomfort lowers every cat's tolerance for being ignored. For the healthy attention-bidder, though, routine is the answer — KinsLe Care Teams can hold the pre-call play and puzzle setup as a shared household duty, so whoever is home can stage her occupation before your next long call begins.