iPhone 6 and 6 Plus Can Play 4K Video Files

TUAW reports that the iPhone 6 and 6 Plus are both capable of playing 4K video files, although not at full 4K resolution.

The devices are able to run and play the high resolution video smoothly without interruption, the only limitation being the fact that the displays have resolutions of 1334 x 750 and 1920 x 1080 pixels, bellow the 3840 x 2160 resolution of 4K. TUAW says that the discovery was made by the developers of WALTR, an app that uploads and converts pretty much any video of any format for native playback on iOS devices.

Source: TUAW