I see my therapist through a university clinic and have no way to obtain her number unless I asked her directly (and I'm sure she wouldn't give it to me). So no, I have not called or texted with my T. However, in our last session I became very vulnerable and told her about something I've been dealing with and she told me that if I felt unsafe or like I needed support in between sessions, I should call. She didn't give me a number, so I guess she meant call the clinic and ask to speak to my T? I haven't done it, though, so I don't know.
I also have never told her about suicidal feelings, so I don't know what she would do in terms of a safety plan if I did. The clinic has a crisis phone line, so perhaps she would give me the number to that?
But I've never felt the need to contact my T outside of session, so I've never bothered to ask.