I'm really having a struggle grasping at what Verizons MiFi is all about. When you use this MiFi is it portable? Or do you have to have a pc or mac nearby to make it work? I'm confused, it seems to me like the 3G capability should be built into the iPad itself. But it says something like you activate it on a mac or pc and then create mobil hot spots. Now if I use my iMac to activate this mifi, if I take the iPad on the road will it still access 3G if I'm no where near my Mac?