Throttling means no more data!
We bought this to use in Japan for 2 weeks. For the first 500 mb of data, the mobile hotspot worked great, but then came the throttling. To me, throttling means slower speeds, but apparently to them it means no more data what so ever. This was dangerous traveling where we couldn't navigate properly and WiFi isn't as prominent in most areas as it is in the US. When I say no more data, I mean we couldn't even load something as simple as going to Google's home page. Edit: messaging didn't work either. Absolutely nothing did.