Here's what's new, according to the changelog:
- OS upgrade – Android 6.0.1 Marshmallow
- The new Touchwiz provides enhanced usability and an updated visual design.
- Quick connect helps you easily find and connect to nearby devices by showing currently connected devices and previous connections.
- Advanced power saving mode restricts background data and extends battery life.
- A new Vibration pattern concept has been applied.
- Android 6.0.1 Marshmallow does not support the Decrypt device function. If your mobile is encrypted, encryption cannot be disabled after upgrading
- If the Samsung Gear or Gear Fit Manager app does not work normally after this upgrade, uninstall the app, then install the latest version. This will reset your Gear to factory default settings and all data on your Gear will be erased.
As noted by SamMobile, the update weighs in at 1.4GB. If you're rocking the Galaxy Note 4, be sure to head into your device's settings to download the OTA update.