There's an ideal of smartphone design that manufacturers have been aiming for since the iPhone in 2007. It looks like a single piece of glass, without any physical buttons or exterior casing. Instead, its face is singularly dominated by a gleaming, borderless display.

Practical limitations have made such a device difficult. Even on today’s iPhone 7, the display only takes up two thirds of the surface area - leading to a lot of wasted space.

Step forward Samsung’s Galaxy S8, and its bigger brother the S8+. Revealed last month, the S8 is the closest thing yet to that futuristic vision of an all-screen phone. Just as importantly, it is very pretty: almost inarguably the best-looking phone ever made.