I will be travelling with my Surface 2 next month overseas and not all hotels provide Room Wifi, but they havce an Ethernet port. Does the surface have a built in Ethernet modem? or is it the same modem as the WiFi? How do I get a wireless hotspot in my hotel room? Do I need to buy a modem and a wireless router or just a wireless router? I need the modem / router to be portable and work with 220V. Many thanks.