Here's a listing of current resources for Sony Ericsson's Anriod phone. This baby looks amazing, though it's on the 1.6 version right now. It's set to launch early next year, I hope it's upgraded to 2.0.
A few of the major specs...
Processor: 1GHz Qualcomm Snapdragon QSD8250
8.1 megapixel camera
Up to 16x digital zoom
Intelligent face recognition features
262,144 colour TFT touchscreen
480 x 854 pixels (WVGA)
Nice find. This phone has a lot of promise. I hope they really get the OS cleaned up and working as fast as its potential. The other thing is it's going to run on 1.6 instead of 2.0 I really hope they upgrade but have a feeling they won't if they're launching in a few months.
As long as you do not upgrade on that line you won't loose it. You can change your phone as long as you don't upgrade to do it. Once you upgrade or extend the plan on that line you will loose unlimited.