Improving on the iPhone 6, the 6s has an A9 chip with an embedded M9 motion coprocessor and welcomes the addition of the 3D touch feature. The 128GB capacity stores plenty of apps and photos, and it also features a 4.7 inch Retina HD display with a screen resolution of 1334x750 pixels and a touch ID fingerprint sensor. The quality rear-facing camera offers 12 megapixels with 5x digital zoom, autofocus, live photos with stabilisation and face detection, while the front-facing FaceTime HD camera offers 5-megapixel photos and 720p HD video recording. Use ApplePay for convenience on the go and Wi-Fi calling to save on minutes. Siri is included for easy messages, reminders and more using voice commands.