The US Senate hearing on Wednesday tripped up AT&T in its attempts to defend its proposed buyout of T-Mobile. When asked by Senator Al Franken if AT&T chief Randall Stephenson thought the iPhone exclusive could have gone to a regional carrier over AT&T, the CEO admitted that it was "not as likely" that Apple would have gone for a smaller carrier over a large national provider like his own. He unusually insisted that the iPhone wasn't responsible for significant growth even though he had repeatedly used it as an example of how data prices had lowered due to the iPh