@sdvetha: To address any temporary software issues, try pressing and holding the Power button and selecting 'Restart' from the Power menu that appears on screen. Immediately following the restart, head to Settings > Connections > NFC and contactless payments, and try toggling it on.
If the issue persists, restart the device in Safe Mode, as this will disable all third party apps, and help to determine if the problem is stemming from an external source. To enter Safe Mode, press and hold the Power button until the 'Power off' prompt appears on the screen then release > Touch and hold Power off until the 'Safe mode' prompt appears then release > To confirm, tap Safe mode.
Once again, head to Settings > Connections > NFC and contactless payments, and try toggling it on/off. If it works as expected, then please restart the phone as you would normally, and uninstall any apps you have introduced since your first encountered the problem.
