keep in mind
Just keep in mind that Clearwire provides some of the worst customer service in the industry. Their obvious goal is to keep you (and your money)...
What's more, , I think readers and ipad fans might be interested in read this "Tips to Turn iPad Wifi Into 3G": (tip:this article is come from iFunia ipad column.
and there are some more ipad tips and tricks, also with free ipad apps and games, resources.