when you get to any of those websites , there isn't a "sign in" or "log in" area?
usually it's in the upper right corner, maybe you have to tap that to open the log in screen?

something about FB-
http://campuslife.asus.com/index/321...ndroid-tablet/


Have you tried to see if there are any updates?
http://www.pcadvisor.co.uk/how-to/go...one-or-tablet/


generally - if something says it has wifi - you can use hot spots or neighbors wireless connections