The Apple iPhone 6S smartphone is a member of the iPhone series announced on September 9, 2015 The iPhone 6S along with the iPhone 6S Plus serve jointly as successors of the iPhone 6 and iPhone 6 Plus. The iPhone 6S are performance versions over its predecessor, featuring upgraded hardware specifications, including 3D Touch, a force-sensitive
touchscreen; improved rear-facing and front-facing cameras; a quicker processor; a new chassis made from a stronger 7000 series aluminum alloy; second-generation fingerprint recognition Touch ID; upgraded
LTE and Wi-Fi connectivity; plus a new rose gold case in addition to the silver, space gray, and gold finishes available on the previous versions, while maintaining an identical design. The 6S ships with iOS 9 preinstalled.
The hardware design of iPhone 6S is virtually identical to that of iPhone 6, granting the chassis is now built of a stronger aluminum initially used by the Apple Watch Sport to enhance its rigidity. It is available in silver, space gray, gold, and new for the 6S, rose gold-color cases. iPhone 6S power comes from the Apple A9 system-on-chip, which Apple stated is up to 70% quicker than Apple A8, and features up to 90% improved graphics performance. iPhone 6S provides 2 GB of RAM, exceeding any previous iPhone, and also supports
LTE Advanced. The Touch ID sensor on the 6S has also been enhanced, with the new version having updated fingerprint scanning performance over the previous version.
While the battery capacity of the previous battery is slightly less, Apple rates iPhone 6S as having the same average battery life as its respective predecessor The A9 system-on-chip is dual-sourced from TSMC and Samsung. However it's speculated that the Samsung version has diminished battery performance over the TSMC version, a number of independent tests have shown there is no dectable difference between the two chips. Although the 6S is not
publicized as such, the iPhone 6S has a dimension of water resistance created by a change to the internal design, which installs a silicone seal around the logic board components to prevent them from becoming shorted by accidental exposure to water.
The display is the same size as those of the iPhone 6, being 4.7-inch 750p. The iPhone 6S contains technology known as 3D Touch; with sensors embedded on the backlight layer of the screen and measures the firmness of the user's input touch by the separation between it and the glass, allowing the iPhone 6 to identify between normal and increased forceful touches. 3D Touch is integrated with the Taptic Engine vibrator to accomplish associated haptic feedback. Although it is comparable, this is different from the Force Touch technology applied to the Apple Watch and MacBook, as it has increased sensitivity and can
diagnose more levels of touch pressure than Force Touch. Because the hardware required to implement 3D Touch, the iPhone 6S weighs more than its predecessor.
iPhone 6S features a 12-megapixel rear-facing camera, an upgrade from the 8-megapixel unit on prior versions, along with a 5-megapixel front-facing camera. It can also capture 4K video, along with 1080p video at 60 frames per second.
Another significant upgrade the iPhone 6S contains over the iPhone 6 is the use of NVMe to interface with their flash controller which expedites SK Hynix TLC NAND flash memory, which results in a maximum read speed of 1,840 mps.
The iPhone 6S comes with iOS 9 the operating system which leverages the 3D Touch hardware to provide the use of new gestures and commands, which includes "peeking" at content with a dainty touch and "popping" it into view by increased pressure, and accessing context menus with links to frequently used functions within apps with increased presses on home screen icons. The camera app's "Retina Flash" feature delivers the brightness to the display which can be used as a makeshift flash on images acquired with the front camera, while "Live Photos" acquires a short video alongside each photo taken.