My wife and I both still have grandfathered unlimited data plans under an "AC FAMILY SHAREPLAN 700". I'm still happy with my phone, but my wife hates hers and is due for an upgrade on 2/28/14. Assuming I still like my phone, and she goes for an upgrade, she's going to lose her unlimited data, which she understands. I still want to keep unlimited data as long as I can on my phone. Is her upgrading going to affect me though? I was curious if one line leaves to go to a share everything plan, if that forces the other phone on that too. Any ideas?