Samsung has started pushing out a new update to the Galaxy On Nxt smartpone in India. It's a major update that brings Android Nougat (version 7.0).
Aside from the usual Nougat goodies Dual Messenger is also included. The update carries firmware version of G610FXXU1BQH8 and weighs in at 1140MB.
As is usually the case with OTA roll outs, it might take time for the update notification to pop up on your device's screen.