Galaxy S Series

So I've been out of the game for a while... Saw some minimalism art and it appealed to me. Decided to start up Photoshop for once and create this small minimalism series, inspired by the Samsung Galaxy S family. Trying to show the evolution of the series.
It's been at least a year since I used Photoshop, so I'm still a bit rusty, apologies.
Took about 45 minutes.

Would love some feedback, as I'm trying to push this style