We still don't know whether this'll be the "industry first" shown off at Sprint's event later today, but in light of the WSJ's information, we certainly wouldn't be surprised. A quick check of Sprint's site currently shows a hit for the Kyocera Echo, described as "the first dual-touchscreen smartphone" that offers a "pivot hinge" design with a maximum of 4.7 inches of combined screen real estate while still being "pocket-friendly." No other details are offered -- and the link to the Echo product page is dead right now -- but it's a
