The iphone 6 resolution is said to be 1,334 x 750 pixels according to Ming-Chi Kuo (an analyst who has got certain predictions right). This gives the 4.7" iphone a ppi of 326. He has also stated that the 5.5" model would have a resolution of 1,920 x 1,080? Update: Another leak suggested a 1,600 x 966 resolution? How plausible are these?