High-fidelity iPhone 4S vector pack. Includes both color variations and orientation modes and comes in Ai, Eps and Pdf formats. Free for personal or commercial use. Licensed under a Creative Commons Attribution 3.0 License.

PS: I am test-driving Pay with a Tweet. If you think that the time I spent making these doesn't worth your tweet, just close the pop-up, you'll still be able to unlock the download link.