I have had a few phone sessions with my t, some where helpful and others not (at all)!
Once she rang after a rupture and we argued on the phone for ages before we finally came to a halt. I think for me it’s important to see my ya face when she speaks because she has a very loud stern voice and so in the phone it can be very harsh. I would rather not have a phone session again.
I hope that it works out for you though.