I've read some of the general threads about this, but was wondering if anyone had thoughts on my specific situation. I currently have an iPhone 4 and am thinking about getting an iPad3. I use my iPhone to make calls about once a week... if that. I do use it frequently to check my email, social networking, browse specific web sites, play the occasional game, etc. Most of the places I use my phone have Wi-Fi, but not all, and I do a bit of traveling where "free" hotel internet sucks or fancy conference hotel internet costs $15/day (um, I'm a poor grad student, and we cram 4 of us into those fancy hotel rooms!). So, I can keep my iPhone, get a wi-fi only iPad, and I guess that would work. Seems like I could tether when I absolutely had to (i.e., those conferences or other travel). OR I could sell my iPhone, buy a cheap pay-as-you-go phone which I estimate will cost less than $10/month in calls, and get an iPad w/ 4G and pay the $30/month for data. Is this crazy? It seems like that would cost *less* than what I have to pay now for the iPhone (since there are no cheap calling plans). Are there any big limitations I'm not thinking about? I already carry my macbook around quite a bit, and the iPad would replace that (getting an iMac for home, which is what is preempting these changes!), so I don't think there are too many times when I would want to carry just a phone and not the iPad... but maybe there are? And then if I can tether from my iPhone, maybe that is the way to go? See my confusion?