I really didn't get all the techno-jive Spuggy was talking about, but, 2 weeks ago in Guangzhao, China, my Droid 2 Global with Verizon as the carrier (and all the roaming carriers) got me voice, text, and data with no issues. A bit pricey, but it al worked.
On the road here in the US my cell has much better coverage than my wife with her ATT.
But I may be prejudiced, ATT dropped me (1999) in the middle of the most important business call I ever had.
I was able to re-connect, get the deal done, and get on with it, but no ATT ever again.