iPhone 8 (gold, 64GB, 2017)

The iPhone 8 was announced September 12, 2017, at the same time as the iPhone X (iPhone ten). Except for a glass back (replacing a metal back), the iPhone 8 (and the iPhone 8 Plus) were similar in design to the iPhone 7 and iPhone 7 Plus models that preceded them. The iPhone 8 was arguably eclipsed by the iPhone X with Apple’s first edge-to-edge screen with no Home button and a design that hinted at future designs of iPhone and iPad devices.

The iPhone 8 had a 4.7-inch Retina HD touchscreen (1334×750 at 326 ppi). Its solid-state Home button used Apple’s Taptic engine and a Touch ID fingerprint sensor. Its front camera was a 7-megapixel FaceTime HD camera, and its back camera was a 12-megapixel 4K camera with a six-element lens system with augmented reality (AR) support.

The iPhone 8 was first offered in gold (white front with gold glass back), silver (white front with silver glass back), and space gray (black front with dark gray glass back), and Apple later added a (PRODUCT)RED Special Edition model (black front with a red glass back).

Internally, the iPhone 8 used an A11 Bionic processor with six cores, 2 GB RAM, and was offered in storage options of 64, 128, and 256 GB. Wireless connections included 802.11ac Wi-Fi, Bluetooth 5.0, LTE (4G), and NFC (Apple Pay). Its only wired connection was the Lightning port (the headphone jack had been removed from the previous iPhone 7 models).

Qi wireless charging was also introduced with the iPhone 8—and also the iPhone 8 Plus and iPhone X, introduced at the same time.

This example of the iPhone 8 is gold.

Sources: EveryMac, Wikipedia

iPhone 7 (black, 2016)

The iPhone 7 had a 4.7-inch screen at 1334×750, also known by Apple as a Retina HD display. It had a front and back camera—the rear camera was 12-megapixel and the front camera was a 7-megapixel FaceTime HD camera with 1080p video.

The iPhone 7 was the first iPhone (along with the iPhone 7 Plus) to remove the 3.5mm headphone jack and only include a Lightning port for audio. Like the iPhone 6 and 6s before it, the iPhone 7 used a “clickless” Home button that clicks using an internal Taptic-engine-powered solid state component. Although the iPhone 7 was not water-proof, it was splash, water, and dust-resistant.

The iPhone 7 models came in several colors: silver (white glass front, silver back); gold (white glass front, gold back); rose gold (white glass front, pink-tinted gold back); black (black glass front, matte black back); jet black (black glass front, a high-gloss black anodized and polished black aluminum back); and later added a (PRODUCT)RED Special Edition (white glass front, red aluminum back).

The iPhone 7 used the Apple A10 Fusion processor, 2 GB of RAM, and was available with 32 GB, 128 GB, or 256 GB of flash storage.

This iPhone 7 is black.

Source: EveryMac

iPhone 6s (16 GB, silver, 2015)

The iPhone 6s had a 4.7-inch “3D Touch” screen at 1334×750 (326 ppi, Retina HD). The iPhone 6s cameras were vastly improved over the iPhone 6 that preceded it: a rear 12-megapixel 4K iSight camera and a front 5-megapixel FaceTime camera in 720p (the iPhone 6 used a, 8-megapixel back camera and 1.2-megapixel front camera).

The iPhone 6s was available in four colors: silver (white glass front, silver back); gold (white glass front, gold back); space gray (black glass front, medium-gray back); and rose gold (white glass front, pink-tinted gold back). 

The iPhone 6s did not use a physical Home button, but used its Taptic engine to simulate the click. It also used a Touch ID fingerprint sensor in the Home button. 

Inside, the iPhone 6s used the Apple A9 processor with 2 GB of RAM and was available in 16 GB, 32 GB, 64 GB, or 128 GB of flash storage. The iPhone 6s was the last iPhone to include a headphone jack (located on the bottom) and used  the Lightning port to connect to computer, dock, or power adapter.

This iPhone 6s example is an entry-level 16 GB model in silver with a white front. Unfortunately, this particular iPhone has a slight crack in the lower-left front screen glass (although it functions perfectly).

Source: EveryMac