This is a concept I've been working on for about a week.
The actual phone is made up of just screen, with there being three main areas: a top bar, a bottom bar and the main display. All of these can be configured by the application. The top bar is mainly used for displaying the app name and things like notification icons.
The first screen shows the welcome screen; the second shows a "Connections" page, where you can view all your messages and notifications; the third shows the application grid/column and the fourth shows the app switcher which can be accessed by holding down the 'home' button and swiping up.
Music Cover picture from here: [link]
Background is from this guy: [link]
or more specifically, from here: [link]
Icons: Nitrux Icons
Fonts used: Open Sans, Raleway, Mank Sans
if you like it!
Oh, and as a side note, this has turned out to look a lot like Sailfish OS (and, as there are a lot of gestures, also feel like it). I didn't really know about Sailfish when I was designing this, but the Connections page might have been inspired by it. ;D