The upcoming 2017 iPhone will feature a 5.8-inch display with 5.15 inches of usable screen space according to new predictions shared by KGI Securities analyst Ming-Chi Kuo. Kuo believes the iPhone 8 will use a 5.8-inch OLED display panel, but that some space will be reserved for virtual buttons.
As has been rumored, the display is said to take up the entire front panel of the iPhone, effectively eliminating bezels, which means Apple will eliminate both the current Home button and the current Touch ID fingerprint recognition technology used in iPhones.
Size wise, Kuo says the OLED iPhone will have measurements similar to the 4.7-inch iPhone, allowing for one-handed operation. Such a size is possible with a 5.8-inch panel because there will be no extra space outside of the display, as can be seen in the mockup below. It will feature a display similar in size to the 5.5-inch iPhone, but in a 4.7-inch package.
https://cdn.macrumors.com/article-new/2017/02/kuoiphone8size-800x470.jpg
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iPhone 8 to Feature 5.8-Inch OLED Display With 5.15-Inch Main Screen and Virtual Buttons Below