<P> The iPhone 6S features a 12 - megapixel rear - facing camera, an upgrade from the 8 - megapixel unit on previous models, as well as a 5 - megapixel front - facing camera . It can record 4K video, as well as 1080p video at 60 and now 120 frames per second . The camera was well received by many critics of the phone . When the camera takes a 4K video recording it can use the storage on the phone rapidly . The 16 gigabyte version of the phone was only able to hold 40 min of video . </P> <P> The iPhone 6S and 6S Plus were originally offered in models with 16, 64, and 128 GB of internal storage . Following the release of iPhone 7 in September 2016, the 16 and 64 GB models were dropped, and replaced by a new 32 GB option . For improved storage performance, iPhone 6S utilizes NVM Express (NVMe), resulting in a maximum average read speed of 1,840 megabytes per second . </P> <P> The iPhone 6S originally ships with iOS 9; the operating system leverages the 3D Touch hardware to allow recognition of new gestures and commands, including "peeking" at content with a light touch and "popping" it into view by pressing harder, and accessing context menus with links to commonly used functions within apps with harder presses on home screen icons . The camera app's "Retina Flash" feature allows the display's brightness to be used as a makeshift flash on images taken with the front camera, while "Live Photos" captures a short video alongside each photo taken . </P> <P> The iPhone 6s currently supports iOS 11 which was first released September 19, 2017, and Apple announced that the iPhone 6s family will receive the upcoming version of iOS, iOS 12 . </P>

When did the iphone 6 and 6s come out