This update to the iPhone increases the screen size to 4.7 inches, improves the camera and processor, adds NFC, and switches to a thinner, more rounded design. Other features are similar to the 5s ...

Commentary: Apple's current, ubiquitous phone design is rooted in the iPhone X and leaves some fans clamoring for a major upgrade. Meanwhile, other iPhone owners are switching to the Motorola Razr.

The most recent models in this group, the iPhone 6 and iPhone 6 Plus ... They are an important part of keeping an iPhone, or any phone, able to contend with today’s security vulnerabilities.

This larger cousin to the iPhone 6 bumps the screen size to 5.5 inches. Compared to the iPhone 5s it also improves the camera and processor, adds NFC, and switches to a thinner, more rounded design.