Does anyone know? Just curious because I don't need a data plan on my iPad month to month, just when I travel. I guess the real question I'm trying to get to is if I opt out of my unlimited data one month, can I activate it a month or two down the road? Or do I have to keep it activated month to month to keep it viable? I ask because I have the opportunity to get and unlimited account transferred to me, but want to know if it's worth it.