The Samsung Galaxy Note 3 is an Android phablet smartphone produced by Samsung Electronics as part of the Samsung Galaxy Note series. The Galaxy Note 3 was unveiled on September 4, 2013, with its worldwide release beginning later in the month. Serving as a successor to the Galaxy Note II, the Note 3 was designed to have a lighter, more upscale design than previous iterations of the Galaxy Note series, and to expand upon the stylus and multitasking-oriented functionality in its software—which includes a new pie menu opened through the button on the stylus for quick access to pen-enabled apps, along with pop-up apps and expanded multi-window functionality. It additionally features new sensors, a USB 3.0 port, 3 GB of RAM, and its video camera has been upgraded to 2160p (4K) resolution and doubled framerate of 60 at 1080p, placing it among the earliest smartphones to be equipped with any of these.

TouchWiz is a discontinued user interface developed by Samsung Electronics with partners, featuring a full touch user interface. It is sometimes incorrectly referred to as an operating system. TouchWiz was used internally by Samsung for smartphones, feature phones and tablet computers, and was not available for licensing by external parties. The Android version of TouchWiz also comes with the Samsung-made app store Samsung Galaxy Store. It was replaced by Samsung Experience in 2017 with the release of Android 7.1.1 “Nougat”*.