IPhone 6 cause the OIS to malfunction. On August 21, 2015, Apple instituted a repair program for iPhone 6 Plus models released between September 2014 and January 2015, citing that faulty rear cameras on affected models may produce blurry pictures. Some iPhone 6 and iPhone 6 Plus models have an issue in which the front-facing camera is somehow "shifted", or out of place. Apple stated that they would replace most affected iPhone 6 models with this issue, free of charge. Despite numerous complaints regarding this issue, it does not seem to actually affect the camera itself. It is said that the camera
IPhone screens on the first three generations have a resolution of 320×480 (HVGA) at 163 ppi; those on the iPhone 4 and iPhone 4S have a resolution of 640×960 at 326 ppi; the 4-inch models, with 640×1136 at 326 ppi; the 4.7-inch models, with 750×1334 at 326 ppi; the 5.5-inch models, with 1080×1920 at 401 ppi; and the 5.8-inch model X, with 1125×2436 at 458 ppi. The initial models were using twisted-nematic (TN) LCDs. Starting with iPhone 4, the technology was changed to in-plane switching (IPS) LCDs. The iPhone 5 model's screen results in an aspect ratio of approximately 16:9. The