1. Open the images. Drag the first photo onto the mobile image. Just hold click and drag. Just make sure the Move tool    is active.





2. Fit the photo into the screen of the first mobile. Press CTRL+T. Then press Enter if you are done.






3. Add a little inner shadow. Click the Add Layer Style button at the bottom of the Layer palette and select Inner Shadow. Set the opacity to 25 in n angle of 150.



                       






4. Now for the second photo, we will the same thing. Drag the photo. Since the second mobile is a slant one so we must transform the image by holding the CTRL key while dragging or bringing the small square in corners of the image to each corner of the mobile screen. And press Enter when you are done.






5. Add also Inner shadow. And there we are, on mobile!