As with previous updates, you can now check out Google's own complete Jelly Bean changelog for the new features of Android 4.2, all on one page. We all know about the big additions of lockscreen widgets, redesigned clock and quick settings in the notification bar, but you may have forgotten about some of the more subtle changes. We're going to be honest there were even a few small things -- like some obscure networking improvements -- in here that we didn't know about.
Check out the full Android 4.2 changelog at the source link below, and be sure to let us know here in the comments if you find something new or interesting that you didn't know before.
Source: Android Changelog