According to a new report, an update to Android 5.1 Lollipop will bring updated TouchWiz UX to Samsung Galaxy Note 4. The latest TouchWiz debuted alongside Samsung Galaxy S6 and Galaxy S6 edge. Most global versions of the Korean giant's flagship phablet are currently running Android 5.0.2. Should it arrive alongside Android 5.1, the new user interface will surely be a welcome addition to the Galaxy Note 4. Unsurprisingly, Samsung Galaxy S6 and Galaxy S6 edge will be the first to receive Android 5.1. There is no timeline on the update for the Note 4. You can find out all about the latest TouchWiz UX by Samsung in our Galaxy S6 review. Source...
Source: http://www.gsmarena.com/android_51_might_bring_new_touchwiz_to_samsung_galaxy_note_4-news-11704.php
