The Hidden Secrets of iPhone OS 4.0
by Unboxed Team on Apr.14, 2010, under iPad News
As beta testers have more and more time to play with OS 4.0 they are discovering a myriad of little difference between 3.0 and 4.0. And of course many of these will likely apply to the forthcoming iPad update. Gizmodo is building a great collection of these “hidden secrets”.