Apple uneviled new Iphone model on wednesday featuring water resistant design upgraded camera system and faster processor betting that after six annual iterations it can still make improvement enticing enough to lure buyers to their next upgrade. The iphone main improvement revolves around the new camera.Past models have only one lens on the back, but new version features a dual lens system on the latger iphone 7 plus.The technology allows for sharper, brighter photos with better ability to zoom without degrading quality