I guess with ex-T and ex-MC, I had both their office landline and their personal cell. I liked that they had an office landline because then I knew I could leave a message at, say, 9 p.m. and they definitely wouldn't answer. Or if I just wanted to hear their voice on the voicemail. I've called current T's cell exactly once and was terrified that he'd answer (he didn't). I did call ex-T and ex-MC on their cells, but it was generally when I was hoping they *would* answer, as they allowed occasional unscheduled nonsession phone calls (unlike T).