Apple is touted to unveil it's most expensive and largest iPhone model today, as part of a lineup of three new iPhone models aimed at widening the product's appeal amid a sales growth that is currently moving slowly. As Apple gears up for a new product launch, most of the buzz is 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 the traditional LCD technology in offering a display without a backlight,  in order to emphasise on the true colour of black instea of being just dark. If the speculation are correct, the 'biggest' iPhone would represent Apple's attempt to feed their consumers' appetite for bigger mobile screens as customers rely highly on that for recording or watching videos and taking photos.