I don’t know what to do anymore.

So my mom has a bad habit of putting her phone on airplane mode and not taking it off for hours. I still live with my parents, but I do have a full time job and I’m still in school. She’s only 57 but it’s very frustrating, because people look for her and end up calling me at work. I end up losing my concentration. I’ve talked to her already but she seems to not understand. I have her on finds friends; but again, she puts her phone on airplane mode and it doesn’t work.