Get a preview of TouchWiz on Nougat.
Samsung’s Android 7.0 Nougat beta program for the Galaxy S7 and S7 edge is now official in the U.S., UK, and South Korea, and will kick off in China shortly. With the Galaxy Beta Program, Samsung is providing early access to its updated user interface, giving users the ability to try out the latest features before they become widely available and share their feedback.
The program is available to all unlocked models of the S7 and S7 edge in the UK, and carrier-branded versions (Sprint, T-Mobile or Verizon) in the U.S. Those using the Galaxy S7 edge Olympic Games or Galaxy S7 edge Injustice Edition models won’t be able to access the beta.
If you’ve got an eligible device, you need to download the Galaxy Beta Program app from the Galaxy Apps store, or the Samsung Members app from the Play Store. Once you’ve downloaded the app, you’ll have to fill out an application form and await confirmation from Samsung.
According to the FAQ, the beta program will run through the end of December, which is when we’ll likely see the final Nougat build. Beta firmware is now available for devices on Sprint, and will be rolling out to Verizon models from November 11, with T-Mobile variants getting it from November 14.
source : http://www.androidcentral.com/android-70-nougat-beta-program-officially-kicks-s7-and-s7-edge