Never had to do it, but I'll be traveling in a few weeks and will need to or pay ridiculous hotel wifi charges (per device no less). I have unlimited data so I'm under the impression ATT won't let me add it to my existing grandfathered plan. My wife has the 2GB plan for $30. If I up her to the 5GB (she's traveling with me) they'll allow me to tether so I can use her phone as a hotspot for my iPad to facetime with my kids back home?