Samsung has released May Security Patch for its Galaxy Note 4 in India. It brought some security fixes and makes the Android Security Patch Level to 1st May, 2016. The update is of 378.38MB in size.
Earlier this month Galaxy Note 4 gets the latest Android 6.0.1 Marshmallow. If you’re on the Galaxy Note 4 in India, This update is rolling out over-the-air and will eventually reach all the users. If you haven’t received the update yet, you can check for it manually by going to Settings > About device > Check for updates.
After update do tell us about your experiances via Comments.