I bought a used Verizon Motorola Droid 2 Global and took it on a trip to Peru, installed a local GSM chip and it worked fine, HOWEVER when I returned to California, I tried my AT&T SIM (Go Phone Pre-Pay) and no connection.  AT&T store tried and told me Verizon had it locked.  This will come as no surprise to most of you and I read about that before I bought it.  It is a neat phone and I like the slider QWRTY keyboard but I have absolutely no intention of ever using it with Verizon, and I have a lighter cheaper new dual SIM phone I use for Peru.  Anyone interested in "rooting" this phone for me if I send it to you?  Otherwise, I will sell it to someone in Peru when I return in September as it works fine there.
Another question:  Is there a Global, open to US carriers, dual SIM 3G/4G phone with physical QWRTY keyboard that I can buy?  Thanks for your input.  Russ