Just wanted to toss in my "me too". Upgraded my Tmo Curve 8320 yesterday. Took about 30-45 minutes start to finish just as advertised. I had to reset my TCP settings, and bit by bit the network started to do its job. UMA picked up after a little bit, tzones icon loaded up, and haven't found any issues yet. In fact, this update resolves at least one bug that I knew of in 4.2.

Lots of layout updates that make the screen even easier to read & look at.

I'm very pleased with the update so far.