Hi5 is another fairly popular social networking site that people find is blocked by many ISPs and countries around the world. In order to Unblock Hi5 you need to purchase a VPN account.
A VPN account will secure, encrypt and anonymous your connection, and at the same time unblock Hi5 and all other sites and services. This is why a VPN account is such a popular solution in order to unblock different sites and services.
So if Hi5 is blocked and you don't know how to unblock it, just get a VPN account and you'll have full access to all sites and services no matter where in the world you travel to.