how iphone works

The new iPhone 6s and iPhone 6s Plus introduced a ton of under the hood improvements: things like 2GB of RAM (finally!), a 12MP rear camera, a 5MP front camera, and the killer A9 chip. Each of those improvements were enough for me to want to upgrade from my iPhone 6. But now that I got my iPhone 6s it’s clear THE killer feature of it is Apple’s new 3D Touch display. It’s not the iPhone 6s’ only USP.