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We've said it before and we'll say it again. The dream is to ditch the traditional telephone network and simply have a data pipe coming into our smartphones, and it looks like that's the aim of AT&T as well. AT&T's federal regulatory division VP, Hank Hultquist, even did a talk on the subject at CES, saying that the telephone network is obsolete, and he wants to push towards an "all-IP telco"...