Bigger, pricier iPhone expected at Apple event Wednesday

Apple is expected to showcase three new iPhones on Wednesday, including its biggest and most expensive model yet, as the company seeks to widen the product's appeal amid slowing sales growth.Most of the buzz is swirling around a rumored iPhone that is supposed to boast a 6.5-inch OLED screen, up from 5.8 inches on the existing iPhone X. OLED is a step up from traditional LCD technology in offering a display without a backlight, so black is truly black rather than simply dark.If the speculation p