I am in the market for a Samsung Galaxy Tab 7.7. It would be the 4G Verizon version. But before I buy it, I want to make sure I can use it as a phone, as in receive and send text messages, and make/receive calls. Does anyone know if this is possible? Also, if I take it to Europe, would I be able to use it there? Will it take a Euro SIM card? Is it unlockable? Thanks very much!