So I had a Droid, sold it on ebay and bought an iPhone 4, didn't like it, and bought a D2G on ebay, and am awaiting its arrival. I've been reading the forums a bit, but some of the info is over my head. So, I have a few questions: 1) I have VZW. I plan to travel to asia later this year. Is it going to be a major undertaking to make this phone work there? Do I need to use a VZW SIM or can I use a foreign SIM? Should I expect to have data service from other carriers? 2) If I root the D2G, will it impact my ability to use it overseas? 3) If I root the D2G, is a ROM required? My only motivation for rooting it is to have a free wifi tether. What are the benefits of custom roms? 4) Are there any drawbacks to rooting the phone? Problems with updates? Apps that dont work? Thanks!