The iOS 10.1 Beta has been available for developers since yesterday, and now the software can be downloaded by anyone, without the need for a developer account.
The 10.1 Beta features a "Portrait" mode, which is exclusive to the iPhone 7 Plus, and uses the second camera. This allows users to create new effects in the pictures, such as focusing on the subject, while blurring the background.
Unfortunately, the portrait mode does not work well in low light, so you have to make sure you are in the room with lots of light.
To sign up for peta, you have to go to beta.apple.com on your Apple device.