This is old news. If you feel the need to try another OS version, research XDA Forums where such might be available.
To get fingerprint screen lock, better battery life and other beneficial upgrades, one has to upgrade Operating System from Lollipop (5.0) to Marshmallow (6.0).
Verizon Customer Service confirms that the Note 3 hardware is 100% compatible with Marshmallow OS. The Note 3 is NOT End of Life hardware.
Many people do not use Screen Lock because password entry is slow and clunky. With the increased amount of personal info on phones, an effective and easy to use screen lock is essential to protecting the personal data on our phones and to avoid personal losses from cyber-crimes.
Verizon is NOT making this available to U.S. Note 3 owners - so they can force people to buy new phones.
What can we do to "encourage" Verizon to make Marshmallow available to Note 3 owners?