Note 4 needs latest Samsung UI because there is no UI changes from lollipop to marshmallow upgrade which is very disappointing. Please take this as consideration and provide at least note 5 marshmallow interface to note 4.
Thanks for being with Samsung and for sharing your feedback. Sir, Samsung offers you the best value on the product released. Updates are rolling out by time to time for the devices, However it totally depends on the availability and compatibility of the update with the devices.
