That is a good question and it seems to be a mixed bag. I've seen post where folks have said they were allowed to transfer from one service to the other and yet others have reported they were not.how do I transfer my lifetime sirius to xm sirius. my steletto 100 died and am very limited in choices
I think the best way to go about it is just to call and see what the process is and if its possible. Report back here with your findings.