So far your text hasn't really had a decent relationship with any of your images in this series. The font face you're using has a lot of character, but not any significant relationship to your subject matter _through_ that character. See if you can't find a font face that better expresses your intent in this series, and it will naturally relate better to your choice of imagery.
MAKE THE PHONE BIGGER. Have it crop off the side of the shirt, thats were design is going, thats what people need to do. A very nice choice of phone, very classic, and still very recognizable. Again, the outline and "bubbles" work well. Personally, I think the font fits this phone to a T, but if that is your concept, let people know. The way the text is arrange seems very Microsoft Word. Really try to work the text into the design. Make people notice the words as much as the visuals. A very respectable start to a great concept.