I like that you took a chance with the diagonal, but I'm not sure whether to love it or hate it. I like the subject and the rectangular repitition, however I wish the hand and phone were sharper.
7 - Good shot and idea for the Challenge - sometimes the titles do matter, without being 'forced', well done. Criticism; not much, the 'odd angle' adds to the shot, so maybe more of an exaggeration, not sure. The 'everyday feel' with the people in the background adds too. Maybe a different crop, eliminating the sleeve, incorporating more of the 'handset', may have made this better in my opinion.