Okay, so I signed up for Sprint and bought T600 last fall, shortly after they first came out. Of course, now my work has changed, requiring me to be in a different country each month. Of course, Sprint's network is only US, and my phone is only single-band.

SO, does anyone have any suggestions on how to:

1) Get rid of my existing T600 and get some value out of it (need the dual-band)

2) Get out of my long-term with Sprint

3) Which provider has been the best value for the money for worldwide coverage and unlimited data service?

thanks in advance for any help/comments