I bought every iPhone ever.

He liked the dense, solid feel and elaborate packaging, and found it impressive that iOS 1.0 still runs smoothly.

A dream phone to him as a 13-year-old, notable for GPS, 3G and the debut of the App Store.

Looks the same as the 3G outside but is a full upgrade inside in speed, battery and camera.

He loves the sharper design of the iPhone 4, though the antenna problems let it down.

An incredible phone that introduced Siri, and the last one Steve Jobs saw announced.

One of Apple's biggest changes, with Lightning, EarPods and a taller screen that he really likes.

Notable for the first 64-bit chip, Touch ID, dual LED flash and the iOS 7 redesign.

He liked the size but never the design, and it was marred by bendgate.

Stronger aluminium and 3D Touch, but not a high point thanks to battery and camera criticism.

More premium feeling with jet black option, but removing the headphone jack felt early.

He really likes it, with a glass back, wireless charging and a dense, good feel.

A real pro phone with Face ID, gestures and Apple's first OLED, though the most expensive iPhone yet.

A conservative, forgettable upgrade by design, but powerful with a strong A12 chip and better dynamic range.

Initially unexcited, he now rates it as one of the best phones to date for battery and camera.