simcard facility
Does this tablet has simcard slot?
If yes, can I use data browsing from my Service provider.
Does it support 3G?
As I heard Tab 3 is of 3G.
unfortunately you cannot use the Galaxy Tab 3 on a cell network. It is only wifi capable unless you buy the Galaxy Tab 3 direct from Samsung with the capabilities of hooking it up to a cell that work with a SIM card of some sort. As far as I have heard. The "3" in galaxy tab 3 just signifies that its the 3rd gen tab of the brand.
This tablet can and is capable of memory expansion via micro sd card.