I'm off in a couple of weeks to have alook around Europe - 10 countries in 20 days.

Taking my LG Optimus 2x with me which should suffice for internet access (I have a cheap no name android 7" tablet but find my LG easier to use despite the smaller screen)

Was looking at an international sim card mainly for data access (messaging through viber) but are free wifi spots easy enough to tap into in Europe?

Alternatively would I be better off buying a sim card over there - the issue is I'll be going through 10 countries so the one sim card would have to work in most of them (UK, France, Italy, Germany, Holland, Austria, Belgium, Switzerland, and some others)

Any suggestions guys?