John Gruber, a well-known programmer and blogger, says that the 4.7-inch iPhone 6 will get a screen resolution 1334h750 pixels (326 ppi), a 5.5-inch version will be equipped with a display with a resolution of 2208x1442 pixels (461 ppi). To obtain this information, John used mathematical calculations by applying the Pythagorean theorem. According to the presented calculations, the pixel density 4.7-inch version of the iPhone 6 will be the same as that of the iPhone 5S. But the 5.5-inch model, according to the calculations of John, needs greater pixel density.
It is worth noting that there is no confirmation of this information is not available. But the news is once again confirmed as expected is the next smartphone from Apple. By clicking on this link , you can see the detailed calculations of John Gruber and find out how he calculated the display resolution iPhone 6.