The fist thing you need to do is to disconnect your carrier data connection. To do this you need to go to SETTINGS-on wireless networks you select MORE - then WIRELESS NETWORKS - MOBILE NETWORKS - then you uncheck MOBILE DATA TRAFFIC.
Then you can download the casino sofware reading this article.
This way you will disable mobile data connection.
After that, as somebody posted above, just download OPERA and google to get the right config to enable the new connection.
I hope it helps