I have the same problem. I'm signed up with the $9.99 plan, and it's been working flawlessly for months up to this morning. Over lunchtime I tried to browse and I kept getting redirected to the same page, telling me that I'm not signed up with the right data plan. I'm still running the 2.2.1 software, so I don't think 3.0 is the problem. I hope there's a way around it 😡