I had one of these, and I think I had to to *22891 or *22892 or something like that. Then when I tried to activate, I had to just wait for it to assume that I meant "activate" because I couldn't press 1 like it told me to.
I remember having the roaming problem and I don't remember what I did about it, or if I even did anything at all about it. I'm sorry I can't be more specific. Most of my problems were involved in getting the SID correct. The CSR was extremely helpful with me getting it activated.