please help im new in the market for an android tablet, i don't like apples products. so please help me to realize how can i get android tablet and actually use it with a 3g/4g on the road (like ipad with att/vrzn does). can i get 3g/4g on a tablet at all ??? can i buy it online and just go to any please and buy a regular simcard to it?? do i have to buy in the actual place that provides the 3g/4g?