Good work - I like the creativity in your designs.
A couple things from a Creative Director perspective.. (and not in the Alicia Keys Creative Director definition...)
(and keep in mind, these are all technical suggestions to enhance realism - I'm NOT trashing your work at all.)
- Take it easy on the lens flare. Seriously.
- Reflections occur directly below objects - unless the object is floating in the air.
- Reflections are typically distorted - unless they're sitting on a mirror. Use blur to distort the reflection.
- Objects have shadows. Create shadows where the device is standing, in between the floor and the reflection.
- The BlackBerry logo on the back of the device appears stretched. Ensure you maintain proportions when scaling. This goes for the camera icon, the phone icon, etc.
- The BlackBerry logo would not be red. It would be either white, black or silver. No exceptions, especially on devices.
- Backgrounds should be solid white or solid black.
Take a look at BlackBerry's own media gallery to see what I mean on some of these points.
BlackBerry Q10 Media, Photos & Images – See BlackBerry Q10 Pictures - Canada
Overall, you're doing great. I understand you're new to photoshop, so to me it looks like you're doing an exceptional job picking up this application.
Keep it up!