To unblock Facebook I've been using 12vpn and it works great
. It's never dropped the signal, its fast for both western and Chinese sites, and it's cheap. Lots of places charge 20 bucks a month12vpn is only 30 dollars for one year. 30 dollars means you have 10,000 Mib per month which is plenty for most people. I don't know exactly what that is but watching video and uploading things use more of it. I've never used even close to that amount and I often watch South Park and movies online etc (I am careful about signing out when I'm not using the internet). Thirty dollars a year is not that bad less than three dollars a month and you can unblock Facebook in China and all that jazz no problem.