Sony Ericsson Launches a Pair of Social Walkman Phones

I know that 3G is included on these phones for international purposes, but if either one of these makes it to At&t in the U.S., I don't understand why they would be equipped with 3G. At&t's 3G issues are partly related to the fact that they have too many "basic/midrange" phones defaulting to 3G in metro areas, siphoning usage off of a network that should be used for data.