But there are smart touches here that can let some calls through, and you can create a custom group of people that are to be let through no matter what, even with Do Not Disturb turned on. Another nice touch: If a phone number calls more than once within a three-minute time span, the iPhone allows the call to go through, under the assumption that the call might be an emergency.

After keeping it mostly unchanged since the iPhone arrived in 2007, Apple has unleashed a brand new Maps app.

As expected, Apple dropped Google as a backend provider for the maps databases. Instead, it turned inward, using the talent its engineers acquired in an , and forging alliances with other companies that have resulted in some pretty neat tricks in the mapping service.

For starters, Maps gets a cleaned-up interface, with a Directions arrow, an address bar, and bookmarks headlining the top menu. The Maps app itself uses vector-based graphics, ensuring smooth graphics to go along with sharp text. Tapping the directions arrow brings up the Directions Interface, where you can enter start and end locations and get directions for driving, walking or mass transit -- though, according to those who have use the WWDC developer build of iOS 6, the last option seems to be relegated to third-party apps. This , compared to earlier iterations of Maps, but that will depend on how the feature is implemented in the final version.