David-
I would not count on having 4g anywhere on the road. As I said, it is very patchwork right now, and Sprint's map doesn't even have it listed outside of KC, and I only found out about the 4G actually being available by accident. I haven't yet tried doing 'outbound' streaming while driving on this phone (I've only had it a couple days!
). I was running Pandora radio while driving in Hays, and I just happened to see the "4G Network Connected" notification flash by. I had somewhere to be, so I couldn't play around with it then, but I also saw it when I came back into Russell. However, it doesn't work in my house (which is why I originally didn't think it would work on Clearwire's signal - according to the map I'm in a good spot), and barely in my driveway, so I'll have to find a place with a good signal to sit and play around with it.
Now I can tell you that when it flipped from 3G to 4G and back, there was no skip in the music stream, but since the music runs through a buffer, I can't tell you how smooth the transition actually was. As far as upload bandwidth, it is supposed to be at least 1meg or better, with download of 10meg or better. Again, I'll have to play with it in a good signal spot.
As far as the data usage, the "on-phone" data (used by the phone browser, apps, etc) is unlimited. So there's no worry about streaming Netflix or Hulu and blowing through a cap. That "on-phone" usage can be USB tethered to a laptop through use of a program called PDAnet or EasyTether, but as far as Wifi/hotspot tethering, that will require your phone to be rooted. Either that or pay the $30 a month for a 5GB bucket of Mobile Hotspot. I installed EasyTether, since I won't have more than one device needing internet (although it's also possible to use the laptop itself as a hotspot with Internet Connection Sharing).
Mark -
Toy envy drives the economy, and don't ever let anyone tell you it's wrong!
I love this phone. If you're due for upgrade in March, you'll probably be in time for the Galaxy Nexus to come out, which is supposed to be even sweeter (but that sweetness comes with a $300 pricetag!).. But when that comes out, the S II should take a decent price hit anyway.