Out with the old, and in with the new—hardware, that is. Here's the skinny on what's hiding behind that oh-so-familiar face:

Apple A9 processor with embedded M9 motion coprocessor

16 or 64 GB of storage

4-inch, 1136 x 640 pixels (326 ppi) Retina display

12 MP iSight camera supporting 4K video recording with 1.22 µ pixels, and a 1.2 MP ƒ/2.4 FaceTime HD camera

802.11a/b/g/n/ac Wi‑Fi + Bluetooth 4.2 + NFC + 19-band LTE

Touch ID sensor supporting user authentication and Apple Pay