What hidden features have you found in iOS 6?

This is the required hidden gems questions for iOS 6.

Here are the rules:

• One feature per answer
• Also include how you use the feature or why it is useful
• Must be an under-documented feature. No "flag pole" features like VIP's in Mail.

Solution 1:

Alarms can now make use of songs not just built in tones. Edit your alarm and select sound and then pick a song.

Solution 2:

Tap and hold the "New Message" button inside Mail to open the Drafts folder.

Solution 3:

Receiving iMessages sent to your phone number on multiple devices.

I know this has been raved about but it is tricky to configure and took me a while to figure out.

Steps to get this working:

1. Disable and then re-enable iMessage on your phone (this triggers the registration process with Apple servers). Done in Settings -> Messages
2. Open Messages in Settings on other iOS devices and disable and then re-enable. This will add your phone number to the list. You need to then select it (a tick mark appears next to it). You will now receive messages on this device. There is also a section to choose to send from an address or number lower on the screen.
3. On OS X devices (10.8.2), open Messages and choose Preferences (from Messages menu) and then choose Accounts. You will now see your number and can select to receive messages on that device.

When you do this, you will get notifications on the other devices confirming that is enabled.