After some searching my answer would be no. I was trying to understand why this would be wanted but then realised that it would be handy if you didn't have wifi or a data connection. Saying that, I wouldn't be surprised if Skype comes out with this feature or the Windows Phone app.
I was able to do something like this when I owned a Symbian phone. I know for certain I was able to do texts but can't remember if I could do phone calls.
Keep in mind WP8 is still a young platform so there's room for growth. Considering it took to 2013 to get it on iPhone should tell you something.
11-06-2013 09:22 AM