I travel between the US and Belize frequently. I have my old phone set up with my Belizean number on NAM2. When I enter the country, I simply switch to NAM2 and my phone works with my provider there. Upon returning to the states, I switch back to NAM1 and I'm back on Verizon.
I cannot find any way to do this in the Droid settings? Is this there? Is there an app that will allow this? A config file you can adjust in a rooted phone?
BTW, not looking to do anything to do anything illegal/wrong here...just want to be able to easily switch providers.