I am having the SAME EXACT problem, I can connect (n800) fine at home (linksys router) and nowhere else. Not an airport, not a Starbucks, not a hotel, nowhere. I know to use the unlocked network, and I do get the n800 feeds, but whenever I try to do my email (gmail) or any other webpage...BINGO, network error. SO frustrating.

Any and all advice welcome