When we used to meet in the house the phone was never in sight but when we started working in a shed in the garden (better than it sounds) she straight up said that she has her mobile in the room in case of emergencies in the room with one of us, because the phone is a lot further away in the house. It is always meant to be on vibrate and has only ever gone off a couple of times, she never responds to it. Once it rang but she rejected the call, apologised and turned it to vibrate. It is always on a shelf behind her.

I would never ring my T during the working day, even in an emergency because I would not want her phone to go off and interior her or any other client. I only ever text and still try to do that later in the day. Just me though, she has never said anything about it except that I won't always get a response during the day because she doesn't get great reception in one of the places she works.