It will give you extra features like 2 free games (Sims2 and Lumines). Also you will be able to use full mp3s as a ringtone. I got one through at&t and it would only allow mp3s that were 30 seconds or less. I just did it because I wanted the fitness app, custom themes, and the "original" shortcut-key. My phone still works and is fine. Just remember to back up if any tutorials say so.